Repolarization during the refractory period is largely due to the:
A)opening of non-voltage-gated K⁺ channels.
B)opening of voltage-gated K⁺ channels.
C)opening of voltage-gated Na⁺ channels.
D)action of the Na⁺/K⁺ pump.

Question

Quizplus · Accepted Answer

During the refractory period, the membrane potential is hyperpolarized and repolarized. This is largely due to the opening of voltage-gated potassium (K⁺) channels, which allows for the efflux of K⁺ ions from the cell, leading to repolarization. The action of the Na⁺/K⁺ pump is important for maintaining the resting membrane potential but does not play a significant role in repolarization during the refractory period. The opening of voltage-gated sodium (Na⁺) channels is responsible for depolarization, not repolarization. Non-voltage-gated K⁺ channels do not have a significant impact on membrane repolarization during the refractory period.

Repolarization During the Refractory Period Is Largely Due to The