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Margarita [4]
3 years ago
13

Do living things have to live on the surface of a planet or moon

Biology
1 answer:
ser-zykov [4K]3 years ago
6 0
I would think it would or it would be super hard to actually find and examine it.
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During the course of an action potential, the membrane potential rapidly rises and reaches a peak of about +40 mV before falling
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Answer:

A)  A decrease in Na+ permeability, and an increase in K+ permeability.

Explanation:

When the potential action reaches a peak of about +40 mv Na+ channels are open and a high number of Na+ ions are entering the inside of the cell. Shortly after this happens the K+ channels will start to open their gates increasing the cell  K+ permeability  while the Na+ channels will start to close their gates, so the Na+ permeability will decrease. This happens  in order to valance the positive charge on the inside of the cell. Normally the inside has a negative charge while the outside has a positive one, as the inside is more positive due to the increase in Na+ permeability at the beginning of the potential action, K+ cations (which are in abundance in the cell) will have to go out through the K+ channels  so as to restore the charge valance, that means that there is an increase in K+ permeability.

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