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| Description: Propagation of an action potential. Following their entry into the neuron. Na’ ions diffuse in both directions within the axon, This is followed by the exit of K+ ions and the diffusion of Na+ down the axon. depolarizing the patch of membrane ahead of where it initially entered. which in turn causes voltage- gated Na* channels to open. Another action potential is thus initiated. Axon Action , 4 if t, potential W
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