When an action potential begins, depolarization of the axon membrane is the result of the: A) closing of voltage-gated channels. B) release of Cl⁻ ions. C) influx of Na⁺ ions. D) influx of K⁺ ions.

Question

Quizplus · Accepted Answer

Depolarization of the axon membrane during an action potential is primarily due to the influx of sodium ions (Na+), which increases the positive charge inside the cell.

When an Action Potential Begins, Depolarization of the Axon Membrane