During an action potential A)Na⁺ efflux causes depolarization. B)K⁺ influx causes repolarization. C)Na⁺ influx causes depolarization. D)K⁺ influx causes after-hyperpolarization.

Question

Quizplus · Accepted Answer

During an action potential, the initial depolarization is caused by the influx of Na+ ions through voltage-gated Na+ channels (Na⁺ influx). This depolarization then triggers the opening of voltage-gated K+ channels (K⁺ efflux), which causes repolarization. Therefore, the correct statement is that Na⁺ influx causes depolarization during an action potential.

During an Action Potential