An action potential is caused by an influx of ________ ions into the cell.
A) potassium
B) sodium
C) calcium
D) magnesium
E) both potassium and sodium

Question

Quizplus · Accepted Answer

An action potential is caused by an influx of sodium ions into the cell, which depolarizes the cell membrane and triggers the opening of voltage-gated ion channels. Potassium ions also play a role in repolarizing the cell membrane after the action potential. Calcium and magnesium ions are not directly involved in generating the action potential.

An Action Potential Is Caused by an Influx of ________