The blood-brain barrier (BBB) is most permeable to which of the following?
A. Platelets, white blood cells and red blood cells.
B. Sodium, potassium and chloride.
C. Glucose and oxygen.
D. Antibiotics.
Answer:
C. Glucose and oxygen.
Explanation:
The blood-brain barrier is a composition of endothelial cells that regulate the entry of substances into the extracellular fluid found in the central nervous system. Their high degree of selective permeability ensures that no solutes can cross the barrier, and only the right substances which are crucial to the workings of the central nervous system can scale through.
Oxygen which is needed for the proper functioning of the central nervous system and which is hydrophobic in nature is allowed to pass the blood-brain barrier. Glucose too which is an important nutrient/macromolecule for brain health can also move through the blood-brain barrier.
How many elements in nitrogen monoxide?
Answer:
Two elements
Explanation:
Nitrogen and Oxygen only, (NO)
13. The differences between two molecules include the type of sugar that
forms a section of the molecules and the identity of one of the four
nitrogenous bases that make up another section of the molecules. These
two molecules are - *
Answer:
DNA and RNA are the molucules
Explanation:
In an atom, which particles make up
the
nucleus?
Answer:
Neutrons And protons
What is the importance of life processes in the human body?
Answer:
life processes is importance to carry out daily life activities.they help to produce energy and maintain homeostasis in the body
What are two reactants needed to for cellular respiration
Answer:
oxygen and gluclose
Explanation:
What challenges cell biologists face in the 21st century?
Answer:
There are many types of challenges are faced by the scientists in 21st century. some are as given below:
Explanation:
1. Getting biodiversity. We're losing species at a disturbing rate, and we have to comprehend what the implications of that may be.
2. sustainable development. Like feasible agriculture, yet more broad sense. Discovering approaches to accommodate human needs while limiting the mischief we cause to the earth is urgent.
3. Everything about hereditary qualities. It's simply so much fun.
4. The most effective method to cut across political, social, and social limits and spur enormous and little scope activity to lessen biodiversity loss. This point may have a hefty sociology component, yet it's significant. All the natural and biological information on the planet won't make any difference on the off chance that we can't get individuals to follow up on it.
Why are the chloroplasts found mostly in the leaves
Answer:
The leaves and sometimes the stems of the plants contain chloroplasts.
Explanation: which produce ATP to meet the energy needs of these plant parts.
The part of the gene that is designated as 1 is also known as:________.
Answer:
Immune or sensory genes.
Explanation:
The part of genes designated as part 1 Gene is refer to immune or sensory genes because these part of gene play a vital role in immune response or sensory signals of the cell.
The part of genes have the same Expression level and different copy number variable region.
When presented with the question “Does soil acidity have an effect on the production of peppers,” develop a hypothesis to answer this question and then design a small controlled experiment to test the hypothesis, listing all procedures and variables. PLEASE PLEASE SOMEONE HELP!!!!!!!!!!!
Answer:
well just search in google if someone did a lab and then copy the lab. But basically, yes it would. The pepper plant would either die or have to adapt to the acidic soil which it wouldn't be able to do. But have a control which has no acidity and then have three other plants with more acidity then the last and watch them grow.
Explanation:
why is the mantle heated by the core and not the crust
Answer:
Hotter material, heated by the core of the Earth rise slowly to the surface of the mantle. Material cools near the crust and then sinks back down to the core, to repeat the process all over again.
One hot afternoon you are
standing on a beach and
notice the wind blowing in your
face as you look out to the
ocean. Why is this happening?
I NEED HELP ASAP!!!!
Answer:
The ocean breeze is causing a breeze coming toward the land from the sea towards the land. this is in all likelihood happening in light of the fact that as cooler air sinks back to the surface, it is blown towards the land and is warmed by Earth.
Sea breezes happen during summer days due to the inconsistent warming rates of land and water. During the day, the land surface warms up quicker than the water surface. Consequently, the air over the land is hotter than the air over the sea. Presently, review that hotter air is lighter than cooler air.
What happens to the gravitational force between two objects as they move farther apart? A:it increases B:it decreases C:it remains the same D:it fluctuates
Answer:
B. it decreases
Explanation:
This is because the force of gravitational attraction depends on the masses of both objects as well as how far away they are from each other.
What is the molecular weight of 1 mole of NaCl where the atomic mass of Na = 23 and Cl = 35.4?
Write a short paragraph describing the role of all types of lipids
Lipid Biological Functions
-Chemical messengers.
-Storage and provision of energy.
-Maintenance of temperature.
-Membrane lipid layer formation.
-Cholesterol formation.
-Prostaglandin formation and role in inflammation.
Why do people with diabetes have a hard time keeping a balance blood-glucose level? A)they don’t synthesize any insulin hormone, to help shuttle glucose into cells when there is a need. B)they don’t synthesize any hormone to keep their blood pressure in check
Answer:
A
Explanation:
i hope thia helps and sorry if yoy get it wrong! ^w^
People with diabetes have a hard time keeping a balance blood-glucose level because they don’t synthesize any insulin hormone, to help shuttle glucose into cells when there is a need. Thus, the correct option is A.
What is Diabetes?Diabetes may be defined as a type of metabolic disease that is characterized by elevated levels of blood glucose (or blood sugar).
The body of individuals with this type of chronic disease does not regulate the amount of glucose (a type of sugar) in the blood and the kidneys construct a large amount of urine.
This whole abnormal circumstance takes place when the body does not synthesize enough insulin hormone that helps in the regulation of elevated blood glucose levels by transforming it into other forms such as glycogen.
Therefore, people with diabetes have a hard time keeping a balance blood-glucose level because they don’t synthesize any insulin hormone, to help shuttle glucose into cells when there is a need. Thus, the correct option is A.
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Which statement describes the focus of an earthquake?
Answer:
B. It develops in the lithosphere.
Explanation:
the other person was right :)
Answer:
B
Explanation:
Identify the niche of the deer.
Answer:
White-tailed deer fill the niche, or role, in ecosystems of both herbivore and prey.
Answer:
The niche of a deer Is being the prey for predators and balancing the vegration in an ecosystem or in a certain area in that ecosystem.
Explantaion:
Hopefully this helps you :)
pls mark brainlest ;)
A biology student wanted to study the effect of fertilizer on the growth of tomato plants. He placed four of
the same type of tomato plants into separate containers, each containing the same amount of soil. Each
pot received a different watering solution containing varying amounts of fertilizer.
The table below shows the average height of the plants by the end of one week.
Plant group
Fertilizer amount (g)
Avg height of plants (cm)
1
O
3.0
2.
5
3.2
3
10
4.4
20
5.0
Which of the plant groups is the control group?
Answer:
plant group 1
Explanation:
Because, it is the only one that has not gotten fertilizer
The plant group that is the control group is plant group 1.
What are fertilizers?Any substance of earthy or man-made origin applied to soil or plant tissues to provide plant nutrients is referred to as fertilizers. It's possible to distinguish fertilizers from spreading agents.
The biology student is studying the effect of fertilizers on plants. Fertilizers increase the growth of the plant, and they also affect the soil of the plant in which they grow.
There are three groups of plants that are used. The growth of the first plant is O and 3.0. The growth of the second plant is 5, 3.2, 3, and 10 and the growth of the third plant is 10, 4.4, 20, and 5.0.
By seeing the Table, we can assume that the growth of plant group 1 is most affected and all other plants have similar.
Thus, the plant group is 1.
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An ostrich and an emu are both flightless birds found on completely different continents (ostrich in Africa, emu in Australia). These birds have slightly different evolutionary histories, but have independently evolved similar adaptations due in part to the similar habitats they occupy. What type of evidence for evolution do these birds present
Answer:
The correct answer is "Biogeography".
Explanation:
The missing options for this question are:
-Comparative embryology
-Biogeography
-Bioinformatics
-Fossils
The correct answer is "Biogeography".
Biogeography is a field of study focused on how species have changed over its evolutionary history regarding its distribution and geographical localization. Biogeography particularly examines biological diversity patterns. The evidence of evolution between the ostrich and the emu populations is of biogeographical type, since they are located in different regions but they are exposed to similar habitats.
What types of cells contain a cell
wall?
Answer:
Plant cell
Explanation:
Cell wall only in plant cells
the disease erythroblastosis fetalis (also called hemolytic disease of the newborn) develops in a fetus or a newborn infant with Rh-positive blood and an Rh-negative mother. Symptoms results when maternal anti-Rh antibodies cross the placenta and interact with the fetus' erythrocytes. Why are the children of Rh-positive mothers not ay risk for this disease
Answer:
Explanation:
Hemolytic Disease of the newborn (HDN, Erythroblastosis Fetalis) is a blood disorder occurring at or around birth, where the blood groups of the mother and baby are not compatible. It occurs when the antibodies from a Rhesus negative (Rh-negative) mother, who has been sensitized from previous pregnancies or other means (transfusion etc), gives birth to an Rh-positive baby, and the blood of the mother and the baby eventually mixes. This causes the anti-Rhesus antibodies in the mother's blood to attack the Rhesus antigen (Also Called Anti-D antigen) on the baby's red blood cells, causing hemolysis that leads to several unpleasant symptoms.
Children of Rh-positive mothers are not at risk of developing HDN, because the mother does not produce anti-Rh antibodies since she is positive, hence there will be no antibodies to cross the placenta and react with the baby's rhesus antigens for Rh-positive babies.
Which of the following should be used to make a precise measurement of
liquid volume?
A. Microscope
B. Test tube
C. Thermometer
D. Graduated cylinder
Answer and Explanation:
D. Graduated Cylinder
You use a Graduated Cylinder. Graduated cylinders have numbers on the side that help you determine the volume. Volume is measured in units called liters or fractions of liters called milliliters (ml).
The Graduated Cylinder used to make a precise measure of liquid volume. Graduated cylinders have digits on the side that help you select the volume. Volume is measured in units called liters or fractions of liters called milliliters (ml).
What tool is used to measure the volume of a solid?A volume of water adequate to cover the things is placed in a graduated cylinder and the volume read.
The entity is added to the cylinder and the volume read again. The contrast between the two volumes is the volume of the object.
Thus,The Graduated Cylinder used to make a precise measure of liquid volume.
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What is the appropriate protein portion for men?
A. 2 palm portions
B. 3 palm portions
C. 2 cupped handfuls
D. 3 cupped handfuls
Answer:
A is correct- 2 palm portions is an appropriate protein portion for men
Explanation:
Two palm portions is the appropriate protein portion needed for men. It is advised to consume 0.8 grams of fat per kilogram of body weight. So, option A is right.
Amino acids are the building blocks of proteins. Your body requires amino acids to create hormones and enzymes, as well as to build and repair muscles and bones. They can also be utilized as a source of energy.
For a typical sedentary adult, the suggested dietary allowance is 0.8 grams per kilogram of body weight.
For men, 2 palm sized portions of protein is recommended in each meal. Palm is used to measure protein and handfuls is used to measure carbohydrates.
30 grams of protein are contained in one palm serving. Two palm pieces would therefore provide roughly 60 grams of protein for a man having 50-70 kilogram, which is a sufficient quantity for most guys.
Therefore, option A, 2 palm portions of protein is the appropriate protein portion for men is the correct answer.
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Diagram a motion graph of a bicycle that travels 80 meters in 16 seconds. What is the speed in meters/second?
Answer:
50
Explanation:
Lysosomes contain enzymes that are necessary for what?
Answer:
They break down all types of biological polymers—proteins, nucleic acids, carbohydrates, and lipids.
Explanation:
Answer:
breaking down of food
Explanation:
Lysosomes are membrane-enclosed organelles that contain an array of enzymes capable of breaking down all types of biological polymers—proteins, nucleic acids, carbohydrates, and lipids.
Which set of features below best describes the radiolaria?
a. phytoplankton; silica 'hard parts'
b. zooplankton; silica 'hard parts'
c. zooplankton; calcite 'hard parts'
d. phytoplankton; cellulose 'hard parts'
Answer:
The correct option is b
Explanation:
Radiolaria (or radiozoa) are protozoa that produce mineral skeleton often made up of silica. They exist as zooplankton in ocean bodies. Zooplanktons are heterotropic planktons that live in open water bodies; they feed on bacteria and algae and are fed on by fish and insects.
The skeletal remains of Radiolaria make up a large part of the ocean floor and are referred to as siliceous ooze.
From the above explanation, we can deduce that the correct option is b
Answer:
The correct option is b
Explanation:
Radiolaria (or radiozoa) are protozoa that produce a mineral skeleton often made up of silica. They exist as zooplankton in ocean bodies. Zooplanktons are heterotropic planktons that live in open water bodies; they feed on bacteria and algae and are fed on by fish and insects.
The skeletal remains of Radiolaria make up a large part of the ocean floor and are referred to as siliceous ooze.
From the above explanation, we can deduce that the correct option is b
Match the following examples to the correct type of bone marking. a shallow depression in the back of the knee joint openings in the cervical vertebrae through which the vertebral artery travels a depression on the skull that houses the frontal lobes of the brain a bony projection on the tibia, below the knee a hole created by bones of the pelvis
Answer:
1. Fossa....a shallow depression in the back of the knee joint
2.Foramen.....openings in the cervical vertebrae through which the vertebral artery travels
3. Fossa....a depression on the skull that houses the frontal lobes of the brain
4. Tubercle...a bony projection on the tibia, below the knee
5. Foramen....a hole created by bones of the pelvis
what molecule of carbon has the least energy?
Why do living things share fundamental characteristics
Answer:
All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life.
Life processes are important to carry out daily life activities. They help to produce energy and maintain homeostasis in the body. The life processes help a body survive with the changes in the environment.
There are several fundamental characteristics or capacities that all living things share, including order, environmental sensitivity or responsiveness, reproduction, growth and development, regulation, homeostasis, and energy processing.
What fundamental characteristics share by living things?All living things share certain basic characteristics or functions, such as order, sensitivity to their environment, growth and development, reproduction, regulation, homeostasis, and the ability to process energy.
These characteristics work to define what it means to live. These characteristics collectively contribute to the definition of life. All of these characteristics will be found in living things.
All living things share the capacities to procreate, grow and develop, use energy, maintain homeostasis, respond to their environment, and be adaptable.
Therefore, all living things share fundamental characteristics.
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