The depolarization phase of an action potential requires _____.
A)opening of K⁺ channels in the membrane
B)opening of Na⁺ channels in the membrane
C)opening of Ca²⁺ channels in the membrane
D)a K⁺ concentration gradient across the membrane
E)a Ca²⁺ concentration gradient across the membrane

Question

Quizplus · Accepted Answer

The depolarization phase of an action potential requires the opening of Na⁺ channels in the membrane, leading to an influx of Na⁺ ions into the cell, causing the membrane potential to become more positive.

The Depolarization Phase of an Action Potential Requires _____