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(Pisikoloji, Ruhbilim) action potential

A short term change in the electrical potential that travels along a cell such as a nerve or muscle fiber

Nerve impulse; brief electrical signal that propagates along an axon or muscle fibre

The sudden change in electrical potential that travels down the axon of a neuron (Anderson)

The electrical part of a neuron's two-part, electrical-chemical message An action potential consists of a brief pulse of electrical current that travels along the axon to relay messages over long distances

A momentary change in electrical potential on the surface of a nerve or muscle cell that takes place when it is stimulated, especially by the transmission of a nerve impulse: Stimulating a nerve fiber causes an action potential to spread across the nerve cell, making it contract. Brief (about one-thousandth of a second) reversal of electric polarization of the membrane of a nerve or muscle cell. Stimulation of the cell by certain chemicals or by sensory receptor cells causes depolarization of the membrane, permitting an impulse to move along the nerve fibre (in nerve cells) or causing the cell to contract (in muscle cells)

An all-or-none membrane depolarization propagated along a nerve fiber without loss of amplitude

The changes in electrical potential generated by the muscle cell membrane or nerve cell tissue in response to intrinsic or extrinsic stimulation There are five phases: phase O is the period of rapid depolarization (polarity changes from negative to positive) and phases 1 through 4 return the cell to resting membrane potential

a reflection of the difference in the concentration of ions across a cell membrane at any given time

the local voltage change across the cell wall as a nerve impulse is transmitted

Cf {\em axon hillock}

Also known as nerve impulse or spike One generally talks about a cell "firing" or "generating" an action potential, or simply "spiking " An action potential is a brief change in membrane potential caused by the rapid opening and closing of transmembrane channels that pass specific ions through Action potentials travel along axons and transfer information over distance In this virtual lab, action potentials are generated in many of the cells you can find and appear as an almost vertical line superimposed on a horizontal oscilloscope trace The total number and the rate of firing of action potentials can encode information, as well as the actual shape of the action potential (some are longer lasting than others, as you can see in the lab) See Background on Nervous System for more details

A brief, regenerative, all-or-nothing electrical potential that propagates along an axon

Changes in electric potential on the membranes of living cells, resulting from cell stimulation, leading to an all-or-nothing action current (H) An abrupt change in the charge differential across the membrane of a nerve cell caused by a change in the permeability of the membrane to sodium ions; the nerve impulse [JA]

The electrical signal which rapidly propagates along the axon of nerve cells as well as over the surface of some muscle and glandular cells It is the result of a change in membrane electrical potential, the underlying cause of which is a change in flow of ions across the membrane due to voltage-activated ion channels

a relatively large amplitude, rapid change in potential across a cell membrane that occurs due to the regenerative activation of certain ionic channels when the potential exceeds a threshold coltage

  Is the result of a brief, localized change in the resting membrane potential When this change of resting potential is measured it can be visualized on an oscilloscope Action potentials are sometimes referred to as spikes or spike potentials

nerve impulse; transmission of a temporary voltage change down a nerve fibre

the brief, all-or-nothing change in membrane potential that constitutes a single response in a neurone

The electrical activity developed n a muscle or nerve cell curing activity; a neural impulse

a brief fluctuation in membrane potential caused by the rapid opening and closing of voltage-gated ion channels Action potentials sweep like a wave along axons to transfer information from one place to another in the nervous system

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