Depolarizing the membrane during an action potential first involves the flow of ________ ions into the membrane.
A) sodium
B) potassium
C) serotonin
D) dopamine

Question

Quizplus · Accepted Answer

During depolarization of the membrane, sodium (Na+) ions flow into the membrane through voltage-gated Na+ channels. This leads to the membrane potential becoming more positive and triggers an action potential.

Depolarizing the Membrane During an Action Potential First Involves the Flow