Action potentials travel in only one direction along a nerve fiber.

Name: Action potentials travel in only one direction along a nerve fiber.
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Action potentials are generated at the axon hillock of a neuron and travel down the axon toward the axon terminals. They cannot travel in the opposite direction because the membrane is in a refractory period, preventing the generation of another action potential until the initial one is complete.

Action Potentials Travel in Only One Direction Along a Nerve