The reason that an action potential is so brief is that
A)a wave of repolarization immediately follows the rising portion of the spike.
B)the closing of potassium gates allows the voltage difference across the neural membrane to be restored.
C)the channels for sodium movement remain open.
D)the sodium-potassium pump restores the electrical gradients.
E)the membrane limits electrical activity.

Question

Quizplus · Accepted Answer

The action potential is brief because the wave of repolarization, primarily due to the opening of potassium channels and the closing of sodium channels, quickly follows the depolarization phase, bringing the membrane potential back to its resting state.

The Reason That an Action Potential Is So Brief Is