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.
Na+ is used to repolarize the membrane does not describe what happen in action potential.
An action potential normally take place when the membrane potential of a specific cell location start riding and the n falls. This depolarization lead to adjacent locations to similarly depolarize.
The membrane become depolarized because of the influx of Na+ due to the opening of the voltage gated Na+ channel and voltage of k+ channel. when K+ channel opens, Na+ voltage closes . The K+ channel move out of the cell resulting in moving of electrochemical gradient out of the cell
Therefore, Na+ is used to repolarize the membrane does not describe what happen in action potential.
Learn more about action potential from the link below.
https://brainly.com/question/6705448
