Question: How is an action potential propagated along an axon? An influx of sodium ions from the current action potential depolarizes the adjacent area. Stimuli from the graded (local) potentials from the soma and dendrites depolarize the entire axon. An efflux of potassium from the current action potential depolarizes the adjacent area. Request Answer Part B Why does the action potential only move away from the cell body? The areas that have had the action potential are refractory to a new action potential. The flow of the sodium ions only goes in one direction-away from the cell body Request Answer Part C The velocity of the action potential is fastest in which of the following axons? Need Assignment Help? a small unmyelinated axon a large unmyelinated axon a small myelinated axon