Each of the following statements correctly describes an action potential EXCEPT which one?
A) Once triggered, an action potential always looks exactly 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 movement of ions through ion channels in the axon membrane, not by the sodium-potassium pump. The pump is involved in maintaining the ion balance, but not in the propagation of the action potential. All the other statements are true.

Each of the Following Statements Correctly Describes an Action Potential