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)a K⁺ concentration gradient across the membrane.
D)a Na⁺ concentration gradient across the membrane.
E)both B and D

Question

Quizplus · Accepted Answer

The depolarization phase of an action potential is primarily due to the opening of Na⁺ channels, allowing Na⁺ to flow into the cell, driven by the Na⁺ concentration gradient across the membrane.

The Depolarization Phase of an Action Potential Requires