Plasma membrane allows some material to pass through it while on the same time it blocks other material from entering through it.
Answer:
(a)45:55
Explanation:
Normally the whole blood is consist of about 45% of blood cells in which there are white blood cells and red blood cells and about 55% plasma. The form of plasma is liquid in which the white blood cells , Red blood cells and platelets are present in suspension form plasma is mainly consist of water and salts but major part of plasma is water
Answer:
yes
Explanation:
There are many bacteria and viruses that are harmful and can cause diseases but there are some bacteria that are helpful
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Answer:
Hello There!!
Explanation:
The answer is=>D. Weathering.
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Explanation:
Glial cells are the cells present in both the type of nervous system in which they neither conduct electrical impulse nor generate them but they perform some other functions like support.
Astrocytes are one of the type of glial cells which are present in the central system of neurons that is in the spinal cord and the brain.
These astrocytes perform various other functions like
1. Form the blood-brain barrier as they enclose the blood capillaries in the brain preventing leakage.
2. They regulate ionic concentration around the neurons.
3. They can store and produce glucose from the non-carbohydrate source.
4. They control the flow of the blood in the brain
5. They can also play a role in the formation of synapses in the neurons.