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Action potential

Video footage: Close up animation of action potential highlighted yellow propagating through neuron soma down axon.
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Definition of the noun action potential

What does action potential mean as a name of something?

noun

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

Alternative definition of the noun action potential

noun

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

Music

  1. "Action Potential" is a musical album of Left Side Brain.
    • released in (9 years ago)
  2. "Action Potential" is a composition.

Miscellanea

Action potential: 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 potentials occur in several types of animal cells, called excitable cells, which include neurons, muscle cells, and endocrine cells, as well as in some plant cells. In neurons, they play a central role in cell-to-cell communication. In other types of cells, their main function is to activate intracellular processes. In muscle cells, for example, an action potential is the first step in the chain of events leading to contraction. In beta cells of the pancreas, they provoke release of insulin. Action potentials in neurons are also known as "nerve impulses" or "spikes", and the temporal sequence of action potentials generated by a neuron is called its "spike train". A neuron that emits an action potential is often said to "fire".

  • also known as 动作电位

Printed dictionaries and other books with definitions for Action potential

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Google previewEncyclopedia of Molecular Pharmacology

by Stefan Offermanns

Table 1 Classification of antiarrhythmic drugs according to Vaughan-Williams Block of repolarizing potassium channels, prolongation of action potential Antiarrhythmic Drugs. Figure 1 Transmembrane ionic currents of the ...

Google previewElectrochemical Dictionary (2012)

by Allen J. Bard, György Inzelt, Fritz Scholz

The action potential is triggered by an initial depolarization to a threshold potential, usually about 15 mV above the resting potential of the cell. An action potential involves a depolarization, a repolarization, and finally a hyperpolarization ...

Google previewCampbell's Psychiatric Dictionary (2009)

by Robert Jean Campbell

action potential Action current (q.v.); the basic unit of information ...

Google previewDictionary of Cardiac Pacing, Defibrillation, Resynchronization, and Arrhythmias (2007)

by David L. Hayes, MD, Samuel J. Asirvatham, MD

action potential. A sudden transient change in activated state. One of the three states of an ion channel. According to the modulated ...

Google previewDictionary of Pure and Applied Physics (2000)

by Dipak Basu

action potential A membrane electric potential exists between the exterior and the interior of a living cell; usually of value 50 mV to 100 mV, with the zero potential reference in the outside medium ...

Google previewThe Concise Corsini Encyclopedia of Psychology and Behavioral Science (2004)

by W. Edward Craighead, Charles B. Nemeroff

The action potential is initiated either as the consequence of summation of local electronic potentials in the region where the axon arises from the neuron cell body (axon hillock), or as a result of a sufficiently large generator potential in the ...

Google previewDictionary Of Anatomy & Physio (2000)

by Poly Mary

A muscle action potential travels over the sarcolemma and enters the transverse tubules and affects the sarcoplasmic reticulum causing it to release Ca:* into the sarcoplasm. 2. The muscle action potential leads to the release of calcium ions ...

Google previewEncyclopedia of the Neurological Sciences (2014)

Consequently, once the membrane has depolarized to approximately the threshold for triggering an action potential, the conductance of the inward rectifier potassium channel decreases and little potassium exits the cell during the rising phase ...

Google previewEncyclopedia of Behavioral Neuroscience, Three-Volume Set, 1- 3 (2010)

Glossary Action potential – Also known as a nerve impulse, spike, or firing, it is a change in neuronal membrane potential that is propagated down the length of the axon. Membrane potential refers to the difference in electrical charge across ...

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