Action Current


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action current

[′ak·shən ‚kə·rənt]
(physiology)
The electric current accompanying membrane depolarization and repolarization in an excitable cell.

Current, Action

 

in physiology, the electric current that develops in nerve and muscle cells and in some plant cells between their excited areas and adjacent resting areas. It is caused by changes in the ionic permeability of the cell membrane and in potential that occur in the excited areas, and is recorded by extracellular electrodes. Action current plays an important role in the distribution of action potential along a cell or fiber.

References in periodicals archive ?
The measured action current from a frog sciatic nerve bundle is shown in Fig.
Morgan Chase Transaction type: Cash flow arbitrage CBO TRANCHE INFORMATION INITIAL LAST ACTION CURRENT Date (MM/YYYY) 10/1999 7/2002 9/2003 Class A note Rtg.
Transaction type: Cash flow arbitrage IG CBO TRANCHE INFORMATION INITIAL LAST ACTION CURRENT Date (MM/YYYY) 10/2000 06/2003 08/2003 Senior Note Rtg AAA BBB- BBB-/Watch Neg Senior Note OC Ratio 115.
Gundersen SC, "First magnetic measurements of action currents in isolated cardiac Purkinje fibers", 11 Nuovo Cimento, 2: 368-378.

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