In the sequence of permeability changes for a complete action potential, the first of these events that occurs is the ________.
A) activation of the sodium-potassium pump
B) inhibition of the sodium-potassium pump
C) opening of voltage-gated sodium channels
D) closing of voltage-gated potassium channels
E) opening of voltage-gated potassium channels

Question

Quizplus · Accepted Answer

The first event in the sequence of permeability changes for a complete action potential is the opening of voltage-gated sodium channels. This allows for an influx of sodium ions, leading to depolarization and the initiation of an action potential.

In the Sequence of Permeability Changes for a Complete Action