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Psychology  /  Psych 0155  ·  Atom · ~20 seconds

The Action Potential

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The action potential is the rapid electrical spike that travels down the axon once the threshold of excitation is crossed.

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Sodium floods into the axon, the charge spikes positive, and the spike sweeps toward the terminal buttons.

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The action potential does not travel like electricity in a wire. It is regenerated at each point along the axon.