Each of the following statements correctly describes an action potential EXCEPT which one?
A) Once triggered, an action potential always looks the same in form and voltage.
B) An action potential continues to propagate itself into the next region of an axon.
C) Action potentials are propagated by the sodium-potassium pump.
D) Action potentials include a depolarization phase followed by a repolarization phase.
E) Action potentials temporarily reverse the polarization of the axon membrane.

Question

Quizplus · Accepted Answer

Action potentials are propagated by the opening and closing of voltage-gated ion channels, not by the sodium-potassium pump. The pump helps maintain the resting membrane potential but is not directly responsible for the propagation of action potentials.

Each of the Following Statements Correctly Describes an Action Potential