action potentials

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action potential
aksiyon potansiyeli
Action potential
(Biyoloji) (Fizyoloji) Eylem potansiyeli, hareket potansiyeli, aksiyon potansiyeli. Tanım: Bir dürtünün kas ya da sınır hücresinin zarından geçmesi esnasında elektrik potansiyelinde olan değişiklik
action potential
(Pisikoloji, Ruhbilim) eylem potansiyeli
İngilizce - İngilizce
plural form of action potential

İlgili Terimler

action potential
A short term change in the electrical potential that travels along a cell such as a nerve or muscle fiber
Action potential
(Biyoloji) In physiology, an action potential is a short-lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a consistent trajectory
action potential
Nerve impulse; brief electrical signal that propagates along an axon or muscle fibre
action potential
The sudden change in electrical potential that travels down the axon of a neuron (Anderson)
action potential
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
action potential
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)
action potential
An all-or-none membrane depolarization propagated along a nerve fiber without loss of amplitude
action potential
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
action potential
a reflection of the difference in the concentration of ions across a cell membrane at any given time
action potential
the local voltage change across the cell wall as a nerve impulse is transmitted
action potential
Cf {\em axon hillock}
action potential
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
action potential
A brief, regenerative, all-or-nothing electrical potential that propagates along an axon
action potential
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]
action potential
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
action potential
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
action potential
  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
action potential
nerve impulse; transmission of a temporary voltage change down a nerve fibre
action potential
the brief, all-or-nothing change in membrane potential that constitutes a single response in a neurone
action potential
The electrical activity developed n a muscle or nerve cell curing activity; a neural impulse
action potential
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
action potential
An electric nerve impulse that travels through a neuron when it is set off by a "trigger," changing the neuron's charge from negative to positive
action potential
a change in the electrochemical balance inside and outside a neuron; occurs when electrochemical stimulation of the neuron reaches or exceeds the neuron's threshold of excitation
action potential
The long-distance signal of the nervous system Action potentials are triggered in excitable cells in response to depolarization that exceeds the threshold potential
action potential
Occurs when a neuron is activated; the electrical state of its interior membrane temporarily changes from negative to positive The electrical charge travels along the axon to the terminal bud where it triggers or inhibits release of neurotransmitter into the synapse If sufficient transmitter substance is present at the synapse to initiate an action potential in the postsynaptic neuron, the impulse continues
action potential
A short duration, large, positive deflection of the membrane potential It is also sometimes referred to as a spike, because of it appearance in voltage traces The large positive membrane potential causes the neuron to release neurotransmitter, thus information transfer occurs with the action potential The action potential is the smallest quantum of information transfer
action potential
The firing on a neuron Occurs when the charge inside the neuron becomes more positive than the charge outside
action potentials

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