At the beginning of the action potential, _____ ions flow from outside the nerve fiber into the nerve fiber.
A) positive potassium
B) negative potassium
C) positive sodium
D) negative sodium

Question

Quizplus · Accepted Answer

During the beginning of the action potential, positive sodium (Na+) ions flow from outside the nerve fiber into the nerve fiber. This influx of positive ions depolarizes the membrane and triggers the action potential.

At the Beginning of the Action Potential, _____ Ions Flow