Action potentials are propagated along a nerve axon by sequentially opening and closing a series of voltage-gated potassium and sodium channels.

Question

Quizplus · Accepted Answer

This is a correct statement. When an action potential reaches a certain threshold, voltage-gated sodium channels open and allow sodium ions to rush into the cell, causing depolarization. Then, voltage-gated potassium channels open and allow potassium ions to leave the cell, causing repolarization. This sequence of channel openings and closings results in the propagation of the action potential along the axon.

Action Potentials Are Propagated Along a Nerve Axon by Sequentially