Question

What is action potential?

Answer 1

Action potential, the brief reversal of. electric polarization of the  membrane of a nerve cell neuron or  muscle cell. In the neuron an action potential produces the nerve impulse, and in the muscle cell it produces the contraction required for all movement. 

Answer 2

Action potential is the change in electrical potential associated with the passage of an impulse along the membrane of a muscle cell or a nerve cell.
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