action potential

noun

Definition of action potential

: a momentary reversal in electrical potential across a plasma membrane (as of a neuron or muscle fiber) that occurs when a cell has been activated by a stimulus

First Known Use of action potential

1913, in the meaning defined above

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The first known use of action potential was in 1913

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action potential

noun

Medical Definition of action potential

: a momentary reversal in the potential difference across a plasma membrane (as of a nerve cell or muscle fiber) that occurs when a cell has been activated by a stimulus

called also spike potential

— compare resting potential — see afterpotential, generator potential, prepotential

More from Merriam-Webster on action potential

Britannica.com: Encyclopedia article about action potential

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