Caption: A graph illustrates the resting potential, threshold and stimuli leading to an action potential in a neuron. This resting potential generally measures about negative 70 millivolts. If stimuli are too weak to reach threshold, which is about negative 55 millivolts, no action potential will be generated. However, if a stimulus is strong enough to depolarize the hillock membrane to threshold, a series of events occurs, resulting in the generation of an action potential.

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Keywords: action potential, nerve cell, neuron, resting potential, stimulus, synapse, threshold

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Action potential in a neuron

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