Action potentials are normally carried in only one direction: from the axon hillock toward the axon terminals. If you experimentally depolarise the middle of the axon to threshold, using an electronic probe, then ________.
A) no action potential will be initiated
B) an action potential will be initiated and proceed only in the normal direction toward the axon terminal
C) an action potential will be initiated and proceed only back toward the axon hillock
D) two action potentials will be initiated, one going toward the axon terminal and one going back toward the hillock

Question

Quizplus · Accepted Answer

Depolarizing the middle of the axon to threshold will initiate action potentials in both directions because the depolarization can spread both ways from the point of initiation.

Action Potentials Are Normally Carried in Only One Direction: from the Axon