excitable cell
A cell in which the membrane response to depolarizations is non-linear, causing amplification and propagation of the depolarisation (an "action potential"). Apart from neurons and muscle cells, electrical excitability can be observed in fertilized eggs, some plants and glandular tissue. Excitable cells contain voltage-gated ion channels.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • excitable cell — a cell that can generate an action potential at its membrane in response to depolarization and may transmit an impulse along the membrane; most are nerve cells or muscle cells, although other kinds of cells have also been shown to be excitable …   Medical dictionary

  • excitable membrane — the membrane of an excitable cell …   Medical dictionary

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  • cell — cell1 cell like, adj. /sel/, n. 1. a small room, as in a convent or prison. 2. any of various small compartments or bounded areas forming part of a whole. 3. a small group acting as a unit within a larger organization: a local cell of the… …   Universalium

  • excitable — 1. Capable of quick response to a stimulus; having potentiality for emotional arousal. Cf.:irritable. 2. In neurophysiology, referring to a tissue, cell, or membrane capable of undergoing excitation in response to an adequate stimul …   Medical dictionary

  • excitable — adjective 1》 easily excited. 2》 (of tissue or a cell) responsive to stimulation. Derivatives excitability noun excitably adverb …   English new terms dictionary

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  • 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… …   Wikipedia

  • Neuron — This article is about cells in the nervous system. For other uses, see Neuron (disambiguation). Brain cell redirects here. For other uses, see Glial cell. Neuron: Nerve Cell …   Wikipedia

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