How does myelin around an axon affect the action potential? Myelin does not affect the rate or the speed of an action potential. All it does is insulate the axon from being influenced by other axons. Myelin increases the speed that an action potential can travel down the axon. Unmyelinated axons send slower signals than myelinated axons. Myelin increases the number of action potentials that can be sent per second. In other words, myelin increases the rate of action potentials. Myelin decreases the speed that an action potential can travel down the axon. Unmyelinated axons send faster signals than myelinated axons. Myelin decreases the number of action potentials that can be sent per second. In other words, myelin decreases the rate of action potentials.
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Myelin is a fatty sheath that wraps around the axons of many neurons in the nervous system and acts as insulation. Show more…
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