action potential - Cultural Definition
The rapid change in electric potential that parts of a nerve cell undergo when a nerve impulse is generated. Unlike ordinary electric current (see also current), which consists of the flow of electrons, the action potential involves the movement of sodium and potassium ions across the cell membrane.
action potential - Medical Definition
action potential - Science Definition
Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.