during a muscle fiber contraction, which decrease in size? multiple select question. entire sarcomere h zone a band i band\

Answers

Answer 1

During a muscle fiber contraction, the H-zone and I-band decrease in size. Therefore, the correct options are H-zone and I-band.

What is muscle contraction?

Muscle contraction is the process in which muscles develop tension, shorten, and generate power. Contraction of muscle fibers is a complex process that requires interactions between various cellular components, including actin and myosin filaments, calcium ions, and several regulatory proteins.

The process of muscle contraction In response to a stimulus, the motor neuron releases acetylcholine into the neuromuscular junction, triggering an action potential to propagate along the sarcolemma (plasma membrane) of the muscle fiber. The action potential depolarizes the T-tubules, which then cause the sarcoplasmic reticulum (SR) to release calcium ions (Ca2+) into the cytosol of the muscle fiber. The Ca2+ ions then bind to troponin on the actin filaments, exposing the binding sites for the myosin heads.

The myosin heads, which are attached to the thick filaments, bind to actin, forming cross-bridges that generate tension and move the thin filaments toward the center of the sarcomere. As the cross-bridges cycle between binding and detachment from actin, the sarcomere shortens, causing the muscle fiber to contract. The H-zone and I-band, which are regions of the sarcomere, decrease in size as the muscle fiber contracts.

Here you can learn more about muscle fiber

https://brainly.com/question/30176507#

#SPJ11  


Related Questions

a muscle spindle is a tonic proprioceptor. what happens to the signal on the sensory afferent neurons that come from the spindle when the muscle spindle is stretched?

Answers

When the spindle is stretched, it sends a signal through the sensory afferent neurons, which causes the muscle to contract. This contraction is an unconscious reflex known as the stretch reflex.

A muscle spindle is a tonic proprioceptor found in muscles that detects and measures changes in muscle length.

The stretch reflex occurs when a muscle is stretched, and the sensory afferent neurons send a signal to the alpha motor neurons. This signal causes the alpha motor neurons to initiate a contraction of the same muscle, resulting in a reflexive contraction of the muscle.

The signal sent from the sensory afferent neurons is an action potential, which is an electrical impulse generated by the sensory afferent neuron. This impulse travels to the alpha motor neuron which causes it to send an action potential to the muscle fibers, resulting in a contraction of the muscle.

The magnitude of the reflexive contraction of the muscle is dependent on the intensity of the stimulus received from the sensory afferent neurons. If the stimulus is too intense, the reflexive contraction will be too strong and may even cause a spasm in the muscle.


In conclusion, when the muscle spindle is stretched, the signal sent through the sensory afferent neurons causes a reflexive contraction of the same muscle, resulting in an unconscious response. The magnitude of the reflexive contraction is dependent on the intensity of the stimulus received from the sensory afferent neurons.

To know more about afferent neurons, refer here:

https://brainly.com/question/14125869#

#SPJ4

which lipid(s) is known for playing an important role in facilitating the activity of proteins involved in atp synthesis?

Answers

Cardiolipin is known for playing an important role in facilitating the activity of proteins involved in ATP synthesis.

What are Lipids?

Lipids are biological molecules that are insoluble in water but soluble in organic solvents. They comprise fats, oils, waxes, sterols, fat-soluble vitamins (such as vitamins A, D, E, and K), monoglycerides, diglycerides, phospholipids, and others. Fatty acids are the basic building units of most lipids.The most important lipids in facilitating the activity of proteins involved in ATP synthesis are cardiolipins (CLs). They are unique phospholipids that are structurally and functionally essential for several bacterial, mitochondrial, and eukaryotic cellular functions.CLs are primarily involved in the proper folding, assembly, and activity of enzymes, especially ATP synthases, which are the molecular machines that produce ATP in all living cells. CLs are required for the stability of these enzymes and their association with other mitochondrial inner membrane proteins.

What are ATP and its Synthesis?

Adenosine triphosphate (ATP) is a high-energy molecule that serves as the universal energy currency in living cells. It's a nucleotide consisting of a nitrogenous base (adenine), a sugar (ribose), and three phosphate groups. ATP is synthesized during cellular respiration through oxidative phosphorylation in the mitochondria of eukaryotic cells or during photosynthesis in the chloroplasts of plant cells.

Here you can learn more about Cardiolipin

https://brainly.com/question/30357115#

#SPJ11  

explain why the mango slices swell up when placed in water

Answers

Because the process of osmosis is taking place.

relate these terms: carbohydrates, digestive system, glucose, metabolized, blood, energy. Highlight each

Answers

The digestive system converts carbohydrates, a type of macronutrient, into simple sugars like glucose. The body then uses glucose for energy production through metabolism.

How does the digestive system process carbohydrates?

All disaccharides and complex carbohydrates are intended to be broken down into monosaccharides for absorption, albeit not all of them are entirely absorbed in the small intestine (e.g., fiber). When you chew food, salivary amylase is released, which triggers the start of digestion.

How are metabolism and carbs related?

Carbohydrates have a major role in metabolism since they are involved in a number of metabolic pathways and the production of energy.  In most populations, starch serves as the main source of energy; however, it must first be broken down in order to be absorbed.

To know more about carbohydrates visit:-

https://brainly.com/question/27022994

#SPJ1

which of the answer choices is the hypothesis that may explain the evolutionary origin of the presence of two photosystems in photosynthetic eukaryotes?

Answers

The hypothesis that may explain the evolutionary origin of the presence of two photosystems in photosynthetic eukaryotes is taking up residence in a primitive eukaryotic host and exists today as chloroplasts.

Thus, the correct answer is an ancient species of photosynthetic bacteria with two photosystems took up residence in a primitive eukaryotic host and exists today as chloroplasts (A).

Photosynthesis is а biochemicаl process used by plаnts аnd photosynthetic eukаryotes to convert light energy into chemicаl energy. Photosynthesis occurs in orgаnelles cаlled chloroplаsts, which аre present in аll green plаnts аnd аlgаe. Chloroplаsts аre thought to hаve originаted from аn аncestrаl photosynthetic bаcterium thаt wаs engulfed by а eukаryotic cell.

The hypothesis thаt mаy explаin the evolutionаry origin of the presence of two photosystems in photosynthetic eukаryotes is the "Endosymbiotic Hypothesis." Аccording to this hypothesis, chloroplаsts аrose from endosymbiosis between а photosynthetic bаcterium аnd аn аncestrаl eukаryotic cell.

Your question is incomplete, but most probably your options were

A. An ancient species of photosynthetic bacteria with two photosystems took up residence in a primitive eukaryotic host and exist today as chloroplasts.

B. Two different ancient photosynthetic bacteria took up residence in a primitive eukaryotic host and are present today as chloroplasts.

C. An ancient species of photosynthetic bacteria with a single photosystem took up residence in a eukaryotic host and eventually evolved a second photosystem.

Thus, the correct option is A.

For more information about photosynthesis refers to the link: https://brainly.com/question/29764662

#SPJ11

what can act as a vector to introduce new genes into a cell? what can act as a vector to introduce new genes into a cell? ligase primers plasmids restriction enzymes

Answers

Answer: Plasmids can act as a vector to introduce new genes into a cell.

What are plasmids?

Plasmids are tiny, double-stranded circular DNA fragments that can replicate themselves separately from the bacterial chromosome. Plasmids are often transferred between bacterial cells and may convey advantages such as antibiotic resistance or the capacity to use unusual nutrients.

To add new genetic material to the bacterial chromosome, plasmids are often used. Plasmids can be taken up by bacterial cells and then expressed.

They may be tailored to contain the genes that are needed for the target cells to accept them. Ligase, primers, and restriction enzymes are all essential components of molecular cloning, which is the method of producing numerous identical copies of a gene.

These components are necessary to link the DNA of the gene to be copied to the vector (e.g., plasmids) that will be used to deliver it to the host cells.



Learn more about Plasmids here:

https://brainly.com/question/29735179#




#SPJ11

which of the following makes up the smallest fraction of the human genome? a) protein-coding genes b) stne elements c) ltne elements d) introns

Answers

The following makes up the smallest fraction of the human genome is LTNE elements. The correct answer is c)

What are LTNE elements?

LTNE is a term that stands for Long Terminal Non-coding Elements. LTNE is often used interchangeably with LTR (Long Terminal Repeats) when talking about the human genome. The LTRs are remnants of retrovirus integration, which means that they make up a significant portion of the human genome. LTNE elements are the smallest fraction of the human genome.

a) Protein-coding genes: Protein-coding genes make up about 1% of the human genome.

b) STNE elements: Short Terminal Non-coding Elements are a type of DNA sequences found in the genome.

c) LTNE elements: Long Terminal Non-coding Elements are transposable elements found in the genome.

d) Introns: Introns are a non-coding part of DNA that separates exons in the DNA sequence, but introns are a larger fraction of the genome than LTNEs.

Here you can learn more about human genome

https://brainly.com/question/25168976#

#SPJ11  

Diferencia entre fecundación interna y fecundación externa

Answers

Answer:

La fertilización interna, a diferencia de su contraparte, la fertilización externa, trae más control a la hembra con la reproducción.

Explanation:

A scientist is comparing the dna sequences of three different organisms. which evidence would support the conclusion that all three organisms are closely related?

Answers

If a scientist is comparing the DNA sequences of three different organisms and wants to conclude that all three organisms are closely related, they would look for evidence of similarity in their DNA sequences

They would specifically search for the following proof:

High degree of sequence similarity: If there is a great deal of similarity between the DNA sequences of the three organisms, this may indicate that they are closely related and had a common ancestor.

Shared genetic characteristics: The existence of particular genes or genetic markers in all three creatures shows that they are closely related and descended from a single species.

Genes or sequences that are conserved: If the three creatures contain genes or sequences that are conserved, it is likely that they have a common evolutionary history and are related.

Geographical distribution: If all three organisms are present in the same area, this is indicative of their close kinship and same ancestry.

TO know more about DNA click here

brainly.com/question/2131506

#SPJ4

which hormone has the most significant effect on a person's physiologic state during a stressful time ?

Answers

The hormone that has the most significant effect on a person's physiological state during a stressful time is cortisol.

What is cortisol?

Cortisol is a hormone that is produced in the adrenal glands. It aids in the body's response to stress. Cortisol levels rise in response to stress, such as physical or mental tension, infection, or injury. It is known as the stress hormone because it regulates your body's stress response.

Cortisol is generated in the hypothalamus, pituitary gland, and adrenal gland. During times of stress, the hypothalamus signals the pituitary gland to release ACTH, which signals the adrenal glands to produce cortisol. Cortisol raises blood sugar levels, regulates the immune system, and aids in the metabolism of fat, carbohydrates, and protein.

Increased levels of cortisol in the body have been linked to a variety of health problems, including anxiety, depression, digestive disorders, heart disease, and obesity.

Here you can learn more about Cortisol

https://brainly.com/question/16288547#

#SPJ4


Help I need an answer for these 3

Answers

5. This is an example of Divergent evolution because they share a trait that originated in an ancestor but changed over time in different populations because they became isolated, A.

6. D, It would reduce the panthers' capacity for inherited variation and would leave them vulnerable to disease and genetic abnormalities because isolation can limit gene flow, reducing genetic diversity and increasing the likelihood of inbreeding and genetic disorders.

7. A, They make their cell membranes different. Domain Archaea's membranes are more similar to that of Eukaryotes because Archaea have unique membrane lipids that differ from those of Bacteria and are more similar to those of Eukaryotes.

What is Divergent evolution?

Divergent evolution is a process by which a species diverges or evolves into two or more different forms, resulting in the development of distinct characteristics and traits. This process occurs when a population of a species becomes isolated from the rest of the population and experiences different selective pressures, resulting in different adaptations and eventually leading to the development of new species.

Divergent evolution is often driven by environmental changes, such as changes in food sources, habitats, or climate, which result in different selective pressures acting on different populations of the same species. Over time, these populations can accumulate genetic and phenotypic differences, resulting in the development of new species.

Learn more on evolution here: https://brainly.com/question/4207376

#SPJ1

The questions are:

5 1 point

A good example of evolutionary classification would include the Galapagos Finches observed by Charles Darwin. When the birds were blown onto different islands, they adapted in response to the food source available. This is an example of ________ because they share a trait that originated in an ancestor but changed over time in different populations because they became isolated.

Divergent evolution

Isolation evolution

Adaptive evolution

Convergent evolution

6 1 point

Due to human encroachment (intrusion on territory), the range of the Florida panther has been reduced to a very small area in South Florida. Predict the long-term effect of this isolation on the conditions

required for natural selection.

Link Florida panthers struggling with loss of their habitat - Bing video

It would boost the panthers' population by limiting their reproductive territory and would eventually decrease the populations of their prey animals.

It would increase the panthers ability to hunt successfully and would eventually lead to an increase in their numbers.

It would limit the panthers variety of food sources and they would all eventually become extinct due to starvation. It would reduce the panthers' capacity for inherited variation and would leave them vulnerable to disease and genetic abnormalities

7 1 point

Which of the following descriptions would distinguish Domain Archaea's with Domain Bacteria?

The Domain Archaea evolved more recently than Domain Bacteria.

They make their cell membranes different. Domain Archaea's membranes are more similar to that of of Eukaryotes.

Domain Archaea are more ancient in their origin.

Domain Bacteria contain Peptidoglycans.

Domain Bacteria are eukaryotes.

what was the outcome of the experiment that reconstituted two different strains of tobacco mosaic viruses that had different infection characteristics?

Answers

The experiment that reconstituted two different strains of tobacco mosaic viruses that had different infection characteristics produced recombinant viruses that have hybrid properties.

A recombinant virus is a virus that has been created by inserting genes from one virus into another. Recombinant viruses can be used to develop new vaccines, antiviral drugs, and other medical treatments. By combining genetic material from different viruses, scientists may produce viruses with novel properties, such as higher virulence or improved infectivity.

The outcome of the experiment that reconstituted two different strains of tobacco mosaic viruses that had different infection characteristics was the production of recombinant viruses that have hybrid properties. The recombinant viruses had characteristics that were intermediate between the two original viruses, and they could infect tobacco plants that were resistant to either of the parent viruses.

In other words, the experiment showed that different strains of viruses can exchange genetic material and produce novel viruses that have unique characteristics. This can have important implications for the study of virology and for the development of new treatments and vaccines.

Learn more about recombinant virus at https://brainly.com/question/30969401

#SPJ11

1.3 Discuss the benefits of goal setting on your career choice.​

Answers

Answer:

Here are a few reasons it's important to set long-term professional goals for yourself:

1.Provides motivation.

2.Gives you focus.

3.Shows your ambition.

4.Aligns your actions with your end targets.

5.Think about what's important to you.

6.Consider what you can realistically achieve.

7.Decide on the best methods for achieving your goals.

please rate my answer and consider me as a brainliest.

true or false? the mesial contact of the mandibular lateral incisor is closer to the incisal edge than the distal contact.

Answers

Answer:

True or false? The mesial contact of the mandibular lateral incisor is closer to the incisal edge than the distal contact.

False

Explanation:

You're welcome.

many of the antiviral drugs currently used to treat hiv/aids also interfere with an enzyme that helps mitochondria multiply. treatment can therefore result in a decrease in the number of mitochondria found in certain tissues. given this information, what might you expect to see in patients treated with antiviral drugs?

Answers

The patients treated with antiviral drugs might experience mitochondrial toxicity. There might be some possible adverse effects such as metabolic disorders, fatigue, loss of energy, and muscle weakness. Antiviral drugs have been found to interfere with mitochondrial functioning leading to mitochondrial toxicity, which results in severe consequences for the patient's health.

Antiviral drugs can interfere with an enzyme that helps mitochondria multiply. The treatment can result in a decrease in the number of mitochondria found in certain tissues. Given this information, patients treated with antiviral drugs may experience mitochondrial toxicity.

Mitochondria are the powerhouse of the cell. They are involved in the production of energy (ATP). There is a possibility of mitochondrial toxicity in patients treated with antiviral drugs that interfere with the functioning of mitochondria, which results in a decrease in the number of mitochondria found in certain tissues. This can cause a severe reduction in the production of ATP and thereby affect the energy balance of the cell.

Here you can learn more about mitochondrial toxicity

https://brainly.com/question/30328472#

#SPJ11

1. Ask Questions Starting with winter wheat as an example, research the role of epigenetic changes in other organisms. Use the "agouti mutation" in mice as a specific example.

Answers

How do epigenetic changes affect the growth and development of winter wheat and other crops?

What is the specific role of epigenetics in regulating gene expression in mice with the agouti mutation?

Can epigenetic changes be used to enhance the nutritional content or resistance to pests and diseases in crops?

How do environmental factors, such as temperature and moisture, influence epigenetic changes in organisms?

What are the potential long-term effects of epigenetic changes on the health and survival of organisms?

Answer:

What are epigenetic changes and how do they occur in organisms?

How does winter wheat utilize epigenetic changes to adapt to its environment?

Can epigenetic changes be inherited by offspring?

How does the agouti mutation affect the phenotype of mice and what is its mechanism of action?

Are there any other examples of epigenetic changes in animals that have a significant impact on their phenotype?

in a hypothetical food chain consisting of grass, grasshoppers, sparrows, and hawks; the sparrows are?

Answers

In a hypothetical food chain consisting of grass, grasshoppers, sparrows, and hawks, the sparrows are Secondary Consumers.

A food chain is a simple linear feeding arrangement, where one organism is eaten by another, which in turn is eaten by another. The arrows in the chain depict the flow of energy from one organism to another. The primary producers are at the bottom of the food chain, followed by the primary consumers, the secondary consumers, and finally the top predator.

Sparrows are Secondary consumers in a hypothetical food chain consisting of grass, grasshoppers, sparrows, and hawks. Primary consumers are organisms that eat producers, like plants. The grass is a primary producer, and grasshoppers feed on grass. Sparrows eat the grasshoppers (primary consumers) and are eaten by the hawks (tertiary consumers). They are not apex predators, so they do not sit at the top of the food chain.

Hence, Sparrows are Secondary Consumers in a hypothetical food chain.

To know more about the food chain, refer here:

https://brainly.com/question/7564953#

#SPJ11

The image displays a structure of fungi. Which of the following best describes the function of the structure displayed in the image below?
O Spore production
O Food absorption
O Water uptake
O Enzyme release

Answers

The feature that best describes the function of the structure displayed of a fungi is A, spore production.

What is the other functions of a fungi?

Fungi are heterotrophic organisms that obtain nutrients by breaking down organic matter in their environment. They secrete enzymes that break down complex molecules such as carbohydrates, proteins, and lipids into smaller, more easily absorbed molecules.

The fungi then absorb these nutrients through their mycelia, which are networks of thread-like structures that extend into the surrounding environment. While fungi do produce spores as part of their reproductive cycle and can release enzymes, their primary function is to obtain food through absorption.

Find out more on fungi here: https://brainly.com/question/10878050

#SPJ1

Answer:

Spore production

Explanation:

I got it right on the test. Dont take this post down smh

Which criteria distinguishes Galápagos island finches from mainland South American finches as different species?
They live in different locations
They eat different foods.
They can't reproduce with each other.
They have different beak shapes.

Need answers ASAP!!

Answers

Answer: they can't reproduce with each other.

Explanation: i took the test and put the answer the person above me gave and i got it wrong.

graded potentials develop in the cell body of neurons as well as in the sensory receptor. in order for sensory information to reach the central nervous system, the graded potential must be converted into an action potential. how (explain the steps) is the graded potential created in the cell body?

Answers

The steps on how graded potential is created in the cell body of a neuron are: Stimulus, Action potential, Graded potentials,  Summation, Axon.

Graded potentials develop in the cell body of neurons as well as in the sensory receptor. To get the sensory information to the central nervous system, the graded potential should be converted into an action potential. The steps on how graded potential is created in the cell body of a neuron are:

1. Stimulus: A sensory receptor is activated by a stimulus. The stimulus can be heat, light, touch, or sound.

2. Action potential: The sensory receptor sends an action potential, which is an electrical signal, down the neuron.

3. Graded potentials: Graded potentials then develop in the cell body of the neuron. Graded potentials are small electrical signals that change the neuron's membrane potential.

4. Summation: The graded potentials' summation causes the membrane potential of the neuron to change enough to generate an action potential.

5. Axon: The action potential is sent down the axon to the synapse. The graded potential is generated due to the movement of positively charged ions, usually sodium, into the cell or negatively charged ions, like chloride, outside of the cell. The influx of ions into the cell causes depolarization of the cell, which leads to the development of a graded potential.

Hence, The steps on how graded potential is created in the cell body of a neuron are: Stimulus, Action potential, Graded potentials,  Summation, Axon.

To know more about cell body of a neuron, refer here:

https://brainly.com/question/21803782#

#SPJ11

wolves live in groups called packs. these fight each other whenever they meet. what kind of competition is this?

Answers

The type of competition that arises when wolves live in groups called packs and fight each other whenever they meet is called intraspecific competition.

What is intraspecific competition?

Intraspecific competition is a struggle for resources between members of the same species. The competition can arise for several reasons, including the need for food, mates, and territory.

An example of intraspecific competition in wolves is when members of a pack fight each other whenever they meet because they are competing for limited resources, such as food or mating opportunities.

Wolves live in groups called packs that are led by an alpha pair of wolves. The alpha pair of wolves, who are usually the most experienced and dominant wolves in the pack, is responsible for leading and protecting the pack. Intraspecific competition can be intense in wolves, especially during the breeding season when wolves are competing for mates and resources.


Learn more about intraspecific competition here:

https://brainly.com/question/31066889#

#SPJ11

A student is looking at a cell through a microscope. The presence of which of the following would indicate that the cell is eukaryotic?
answer choices
DNA
Cytoplasm
Plasma membrane
Nucleus

Answers

Cytoplasm is the correct answer.

however, many proteins are short-lived and may be degraded in days or even hours. why do cells make proteins with such a short life?

Answers

The main reason why cells make proteins with a short lifespan is to regulate the functioning of the cell. The proteins that have a short life are known as labile proteins.

These proteins are usually important in carrying out various functions in the cell, such as signaling and metabolic pathways. However, they need to be tightly controlled to ensure that they don't accumulate in the cell and cause damage to the cell.

Labile proteins are usually broken down by the ubiquitin-proteasome system. This system is responsible for breaking down misfolded or damaged proteins, as well as proteins that are no longer needed by the cell. The process involves attaching ubiquitin molecules to the labile protein, which marks it for degradation by the proteasome.

This system ensures that the labile proteins are broken down quickly and efficiently, thus preventing the buildup of unwanted proteins in the cell. It also allows the cell to quickly adjust to changes in its environment, such as changes in nutrient availability or exposure to stressors.

In summary, cells make labile proteins with a short life to regulate their function and prevent the buildup of unwanted proteins in the cell. The ubiquitin-proteasome system ensures that these proteins are broken down quickly and efficiently.

Here you can learn more about proteins

https://brainly.com/question/30258984#

#SPJ11

What is the SRY gene? Where is it found, and what does it do?

Answers

Answer:

The SRY gene is a gene located on the Y chromosome in mammals, including humans. SRY stands for "sex-determining region Y", and the gene is responsible for initiating male sex determination during embryonic development.

In humans, the presence or absence of the SRY gene determines the sex of the individual. If the SRY gene is present, it produces a protein called testis-determining factor (TDF), which triggers the development of testes and the male reproductive system. If the SRY gene is absent, the individual will develop ovaries and the female reproductive system.

The SRY gene is essential for normal male sexual development and is highly conserved across mammals. Mutations in the SRY gene can lead to disorders of sex development, such as individuals with XY chromosomes who develop female external genitalia (due to a lack of functional SRY gene).

Overall, the SRY gene is an important example of how genetic information can control fundamental biological processes, such as sex determination and reproductive development

The SRY gene is a gene located on the Y chromosome in humans that encodes the SRY protein, which is responsible for initiating male sex determination. It is found on the Y chromosome, one of the two sex chromosomes. The SRY protein is involved in the development of testes, which are the male gonads responsible for producing sperm, and the male sex hormone testosterone.

The SRY gene is commonly known as the "sex-determining region Y" gene, and it is the master gene that directs the undifferentiated gonads to develop into testes rather than ovaries. Women have two X chromosomes, while men have an X and a Y chromosome, the SRY gene is found only on the Y chromosome and is absent from the X chromosome. The protein helps in the regulation of gene expression, ensuring that the genes necessary for male development are turned on and those required for female development are switched off. The SRY gene is critical for male sexual development, and without it, an embryo would develop as a female, regardless of its genetic makeup.

Learn more about the SRY gene: https://brainly.com/question/11880347

#SPJ11

a cell whose haploid number is 12 will have how many chromosomes present at prometaphase of mitosis?

Answers

At prometaphase of mitosis, a cell whose haploid number is 12 will have 12 chromosomes. This is because the haploid number is the total number of chromosomes present in a gamete (sex cell). At the beginning of mitosis, the number of chromosomes is equal to the haploid number, so a cell with a haploid number of 12 will have 12 chromosomes at prometaphase.


In mitosis, two sets of replicated chromosomes (i.e. two copies of each chromosome) are present. Thus, at prometaphase, there will be a total of 24 chromosomes in the cell - 12 replicated chromosomes, each containing the same genetic information.

This number of chromosomes can be further divided into two sets of homologous pairs, each containing one set of replicated chromosomes.

Know more about mitosis here:

https://brainly.com/question/29776367

#SPJ11

Which birds have the longest migration trips?
A. Brent Geese
B. Great Snipe
C. Arctic Tern
D. Adélie Pengui

Answers

Arctic Tern has the longest migration trips of any bird. The Arctic Tern is known for its remarkable annual migration, which takes it from its breeding grounds in the Arctic regions to its non-breeding areas in the Antarctic and back again. So the correct option is C .

This round-trip migration covers a distance of approximately 44,000 miles (70,900 kilometers), making it the longest migration of any bird. The Arctic Tern spends most of its life in flight and can travel up to 56 miles (90 kilometers) per hour. Its migration is driven by the availability of food, with the birds following a route that takes them over areas of abundant prey.

Learn more about longest migration

https://brainly.com/question/28231062

#SPJ4

How does oil that's ingested by marine organisms move up the food web?

Answers

Answer:

through blood

Explanation:

because it's thick

Which of the following statements about the movement of substance across the cell membrane is true
a. water moves across the cell membrane only through protein channels
b. water moves freely across the cell membrane
c. electrolytes move freely across the cell membrane
d. water and electrolytes cannot move across the cell membranes
e. all od the above f. none of the above?

Answers

The correct answer is "b. water moves freely across the cell membrane."

Water molecules are able to move freely across the cell membrane by a process known as simple diffusion. This is because water molecules are small enough to pass through the cell membrane's phospholipid bilayer. As the water molecules move from an area of high concentration to an area of low concentration, they help to balance the concentration gradient across the cell membrane. Additionally, water molecules are able to move through specialized protein channels, such as aquaporins, that are embedded in the cell membrane.
Electrolytes, such as sodium, chloride, and potassium, cannot move freely across the cell membrane. Instead, they require the help of specific proteins known as ion pumps to move across the cell membrane. Therefore, statement "c. electrolytes move freely across the cell membrane" is false.
Therefore, the correct answer is "b. water moves freely across the cell membrane."

For more such questions on membrane

https://brainly.com/question/19360972

#SPJ11

dont make the answers to long pls (100 points)


Key Questions and Terms Notes
An ___________ is when you gather facts through observation, questioning, or studying.
An _____________ is the process of using an independent and dependent variable to test a hypothesis.
List a few benefits and a few limitations for each:
• Investigation:
• Experiment: Investigation Experiment
Benefits:




Limitations:
• • • Benefits:




Limitations:
• • •
What are microorganisms?
What are the four types of human pathogens that can cause infectious disease?
What are a few ways diseases spread?
What is the role of the immune system?
An ______________ happens when cells and fluids in the body react to the presence of a pathogen.
What are lymphocytes, and why are they important?
Describe the role of each of these white blood cells:
• T cells:
• B cells:
Name one or two diseases that affect each of these body systems:
• Respiratory:
• Digestive:
• Nervous:
• Circulatory:
• Musculoskeletal:
_____________ are chemicals that kill bacteria or slow their growth without harming the human body.
What are the best ways to avoid getting bacterial and viral infections?
What are noninfectious diseases, and how do people get them?
When something is ___________, it’s determined by genetic factors and able to be passed from parents to their offspring.
What are some examples of inherited traits?
Cystic fibrosis, Huntington’s disease, and sickle cell anemia are examples of ______________.
Allergies, asthma, high blood pressure, and heart disease are examples of conditions caused by ______________.

A Moment of Science: Five-Second Rule Video:
Key Questions and Terms Notes
Why are viruses hard to treat?
What are bacteria? Are they good or bad?
Fungi can appear in what two forms?
Give a few examples of parasites.
How does disease spread?

Answers

Answer:

An observation is when you gather facts through observation, questioning, or studying. An experiment is the process of using an independent and dependent variable to test a hypothesis.

Investigation:

Benefits:

• Can be less costly and time-consuming compared to experiments

• Can provide a broader range of information

• Can lead to new hypotheses

Limitations:

• May not provide a cause-and-effect relationship

• Cannot control variables like in an experiment

• May have biased or incomplete data

Experiment:

Benefits:

• Can establish cause-and-effect relationships

• Can control variables for accurate results

• Can be replicated for reliability

Limitations:

• May not apply to real-world situations

• May be costly and time-consuming

• May not account for all variables

Microorganisms are small living organisms that can only be seen through a microscope.

The four types of human pathogens that can cause infectious disease are bacteria, viruses, fungi, and parasites.

Diseases can spread through direct contact with an infected person, through contact with contaminated objects or surfaces, through the air, through insect bites, and through contaminated food or water.

The immune system is responsible for protecting the body from pathogens and foreign substances.

An immune response happens when cells and fluids in the body react to the presence of a pathogen.

Lymphocytes are a type of white blood cell that play a key role in the immune response.

T cells recognize and destroy infected cells and help coordinate the immune response. B cells produce antibodies that target specific pathogens.

Respiratory: pneumonia, tuberculosis

Digestive: cholera, E. coli infection

Nervous: meningitis, encephalitis

Circulatory: influenza, malaria

Musculoskeletal: arthritis, Lyme disease

Antibiotics are chemicals that kill bacteria or slow their growth without harming the human body.

Washing hands frequently, avoiding close contact with sick individuals, and getting vaccinated are some of the best ways to avoid getting bacterial and viral infections.

Noninfectious diseases are not caused by pathogens and cannot be spread from person to person. People can get them from genetic factors, lifestyle choices, and environmental factors.

When something is hereditary, it’s determined by genetic factors and able to be passed from parents to their offspring.

Some examples of inherited traits include eye color, hair color, and height.

Cystic fibrosis, Huntington’s disease, and sickle cell anemia are examples of genetic disorders.

Allergies, asthma, high blood pressure, and heart disease are examples of conditions caused by lifestyle or environmental factors.

Viruses are hard to treat because they use the host's cells to replicate and spread, making it difficult to target them without harming healthy cells.

Bacteria are single-celled microorganisms that can be both good and bad. Some bacteria are necessary for human health, while others can cause disease.

Fungi can appear in two forms: as single cells (yeasts) or as multicellular organisms (molds).

Examples of parasites include tapeworms, malaria parasites, and lice.

Diseases can spread through direct contact, airborne particles, contaminated food or water, and insect bites.

Explanation:

06.05 Infections and Health Guided Notes

PLUS

NEXT NOTES

HOPE THIS HELPS!!!!!!!!!!!!!!!!!!!

growth hormone, secreted by the pituitary gland, is important for normal growth of body tissues. which tissue type of a long bone is a major target of growth hormone?

Answers

The tissue type of a long bone that is a major target of growth hormone is the epiphyseal plate or growth plate.

The epiphyseal plate is a layer of hyaline cartilage that separates the diaphysis (shaft) and epiphysis (ends) of long bones in children and adolescents. This cartilage is responsible for longitudinal growth of the bone, and it is stimulated by growth hormone produced by the pituitary gland.

During childhood and adolescence, growth hormone promotes the proliferation and differentiation of chondrocytes (cartilage cells) in the epiphyseal plate, leading to an increase in bone length. As a child reaches adulthood, the epiphyseal plate undergoes ossification, and longitudinal bone growth ceases.

Learn more about growth hormone here:

https://brainly.com/question/21125806

#SPJ11

Other Questions
Sr. Romero: Cul es tu direccin?You: ________ Mi direccin es Casa #27 San Rafael, Cartago, 07050 Costa Rica. La direccin es Casa #27 San Rafael, Cartago, 07050 Costa Rica. Tu direccin es Casa #27 San Rafael, Cartago, 07050 Costa Rica. Su direccin es Casa #27 San Rafael, Cartago, 07050 Costa Rica. which one of the following amino acids r groups (a.k.a. side chain) is most likely to participate in hydrogen bonding with water? group of answer choices asparagine alanine leucine phenylalanine valine Dan had 50% fewer stickers than Jeff. After Jeff gave 20 of his stickers to Dan, Dan had 40% fewer stickers than Jeff (had after he gave away 20 of his stickers). How many stickers did Dan have at first? two guys who weight the same are holding onto a massless pole while standing on horizontal frictionless ice. 1)if the guy on the left starts to pull on the pole, where do they meet? In one to two sentences, describe a theme of the excerpt. Self porptrait What is the difference in volume (in mL) of oxygen produced between the low-light and high-light plants after 45 minutes? jean piaget believed that human behavior is based on specific human needs that must often be met in a specific order true false Kilroy uses the net method to record sales on account. kilroy sells goods on account for $1,000 with terms 2/10, n/30. the journal entry to record this transaction will include (select all that apply.) multiple select question. debit to sales, $1,000.credit to sales, $980.credit to sales, $1,000. credit to accounts receivable, $980. debit to accounts receivable, $1,000.debit to accounts receivable, $980. what is observed when syntenic genes are close enough to one another that they are unable to assort independently? (1.8 x 10^8) / (3 x 10^2) Find the area of the shaded sector of the circle two-thirds less than a number As a particle moves 12 meters along an electric field of strength of 80 Newtons per Coulomb its electrical potential energy decreases by 5.2 x 10^-18 Joules.What is the particle charge?Giving out brainliest please help this is due today. what is the safest state to live in from natural disasters? What was primary reason for the demographic shift described in this excerpt? state the meaning of the central limit theorem in your own words. how important is it to the development and use of statistical quality control techniques? when a variable is passed by value, changes to that argument made within the module also affect the value of the variable in the part of the program that made the call to that module. T/F please help me solve this ill mark brainliest En el juego de tenis un jugador blank space la pelota al otro. . fill in the black A. CorreB. AtrapaC. Batea D. DevuelveE. Dribla F. Marca 37. a wheel has a constant angular acceleration of 5.0rad/s2 . starting from rest, it turns through 300 rad. (a) what is its final angular velocity? (b) how much time elapses while it turns through the 300 radians?