An action potential usually goes only in one direction in an axon because:
A)the ions can flow only in one direction.
B)the refractory periods force the impulse to go in one direction.
C)the ion flow is attracted to chemicals in the synaptic knob.
D)autoreceptors inhibit backward flow of ions.

Question

Quizplus · Accepted Answer

The refractory periods (absolute and relative) prevent the backward propagation of the action potential, ensuring it moves in only one direction along the axon.

An Action Potential Usually Goes Only in One Direction in an Axon