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Action potentials move along axons
A. more slowly in axons of large than in small diameter
B. by activating the sodium-potassium "pump" at each point along the axonal membrane
C. more rapidly in myelinated than in unmyelinated axons
D. by reversing the concentration gradients for sodium and potassium ions

Respuesta :

C, more rapidly in myelinated than in non-myelinated axons.

Continuous propagation is the method used to transfer action potentials through unmyelinated axons, in which the traveling action potential impacts one segment of the axon at a time. The cycle repeats, propagating the action potential up the axon in just one direction, at a rate of around 1 meter/sec, until a local current depolarizes the following segment to threshold.

Saltatory propagation, which is quicker and requires less energy, transports an action potential through a myelinated axon. The action potential's local current "jumps" from one Ranvier node to the next in saltatory propagation.

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