After the peak of an action potential, what prevents sodium ions from continuing to enter the cell?
A) There is no longer a concentration gradient for sodium.
B) The sodium-potassium pump greatly increases its rate of activity.
C) All the available sodium ions have already entered the cell.
D) The sodium gates in the membrane close.

Question

Quizplus · Accepted Answer

The sodium gates in the membrane close after the peak of an action potential, preventing further entry of sodium ions. This helps maintain the resting membrane potential and prepare the neuron for the initiation of another action potential.

After the Peak of an Action Potential, What Prevents Sodium