action current (redirected from Current, Action)

current /cur·rent/ (kur´ent)

1. anything that flows.

2. electric c.

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action current  the current generated in the cell membrane of a nerve or muscle by the action potential.

alternating current  a current which periodically flows in opposite directions.

convection current  a current caused by movement by convection of warmer fluid into an area of cooler fluid.

direct current  a current flowing in one direction only.

electric current  the stream of electricity that moves along a conductor. Symbol I .

galvanic current  a steady direct current, especially one produced chemically.

current of injury  a flow of current to (systolic c. of injury) or from (diastolic c. of injury) the injured region of an ischemic heart, due to regional alteration in transmembrane potential.

pacemaker current  the small net positive current flowing into certain cardiac cells, such as those of the sinoatrial node, causing them to depolarize.

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action current

n.

An electrical current generated in a cell such as a neuron or muscle cell during the action potential.

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action current.

See action potential.