Immediately after an action potential has peaked, which of the following channels will open?
A) voltage gated potassium channels
B) voltage gated sodium channels
C) voltage gated calcium channels
D) chemically gated chloride channels

Question

Quizplus · Accepted Answer

Immediately after an action potential has peaked, voltage gated potassium channels will open, allowing for the efflux of K+ ions and repolarization of the cell membrane. Voltage gated sodium channels have already opened and then inactivated during depolarization. Voltage gated calcium channels are involved in neurotransmitter release and are not relevant to repolarization of the cell membrane. Chemically gated chloride channels are not involved in the generation or propagation of an action potential.

Immediately After an Action Potential Has Peaked, Which of the Following