Action potentials begin by the
A) opening of voltage-activated sodium channels.
B) closing of ligand-activated chloride channels.
C) closing of ligand-activated potassium channels.
D) opening of ligand-activated potassium channels.
E) closing of voltage-activated calcium channels.

Question

Quizplus · Accepted Answer

Action potentials begin with the opening of voltage-activated sodium channels. This allows sodium ions to rush into the cell and cause depolarization, which ultimately triggers the propagation of the action potential along the axon.

Action Potentials Begin by the