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d1i1m1o1n [39]
3 years ago
11

Which of the following does NOT describe conditions that occur during an action potential?

Biology
1 answer:
salantis [7]3 years ago
7 0

Answer:

D) Na+ is used to repolarize the membrane.

Explanation:

Option D is wrong choice because it is K+ which is used to repolarize the membrane not Na+.

As soon as membrane gets depolarized because of influx of Na+ due to opening of voltage gated Na+ channels simultaneous opening of voltage gated K+ channels and closing of Na+ voltage gated channels takes place. As a result of which K+ moves out of the cell leading to drawing of electrochemical gradient out of the cell.

In order to achieve resting membrane potential, more Na+ must be out of the cell and more K+ must be inside the cell. There are many leaky channels on neurons from which Na+ has tendency to leak into the cell while K+ has the tendency to leak outside of the cell. So Na+/K+ pump which is located on the membrane of neuron keeps pushing Na+ outside of the cell and K+ inside the cell so as to maintain resting membrane potential which is -70 mV.

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