You searched for: “action potentials”
action potential (s) (noun), action potentials (pl)
The change in the potential difference (voltage) across the membrane of a nerve cell when an impulse passes along it:

An action potential is a variation in potential (from about -60 to +45 millivolts) that accompanies the passage of sodium and potassium ions across the membrane.

This entry is located in the following units: Anatomy and Related Anatomical Terms (page 1) Biology Terms + (page 1)