Action potentials
A) do not occur in muscle fibers.
B) spread out in two directions on either side of a receptor site.
C) travel in only one direction,from one end of a muscle fiber to the other.
D) result from the opening of potassium channels.

Question

Quizplus · Accepted Answer

Action potentials spread in both directions from the point of initiation, such as a receptor site, along the membrane of a muscle fiber or neuron.

Action Potentials