An action potential begins with a
A)stimulus.
B)depolarization.
C)repolarization.
D)refractory perioD.

Question

Quizplus · Accepted Answer

An action potential begins with a stimulus, which can be either a chemical signal (such as a neurotransmitter) or a physical force (such as pressure or stretching). This stimulus causes a change in the electrical potential across the membrane of the neuron, leading to depolarization and the initiation of an action potential. Repolarization and the refractory period occur after the action potential has been generated.

An Action Potential Begins with a