The hyperpolarization observed following an action potential is the result of
A) potassium continuing to leave the cell.
B) chloride continuing to enter the cell.
C) sodium continuing to enter the cell.
D) potassium returned to the cell by the sodium-potassium pumps.

Question

Quizplus · Accepted Answer

The hyperpolarization observed following an action potential is the result of potassium ions continuing to leave the cell. During the repolarization phase of the action potential, voltage-gated potassium channels open, allowing potassium to move out of the cell. This results in a negative membrane potential, or hyperpolarization, until the resting membrane potential is restored by the action of the sodium-potassium pumps.

The Hyperpolarization Observed Following an Action Potential Is the Result