The repolarization phase of the action potential in a neuron is driven by the
A) closure of potassium channels.
B) opening of calcium channels.
C) opening of sodium channels.
D) opening of sodium channels and closure of potassium channels.
E) closure of sodium channels and opening of potassium channels.

Question

Quizplus · Accepted Answer

The repolarization phase of the action potential in a neuron is primarily driven by the closure of sodium channels, which stops the influx of sodium ions, and the opening of potassium channels, which allows potassium ions to exit the cell. This movement of potassium out of the cell helps to restore the negative internal environment of the neuron, effectively returning it to its resting state.

The Repolarization Phase of the Action Potential in a Neuron