gate

1. To close an ion channel by electrical ( e.g., membrane potential) or chemical ( e.g., neurotransmitter) action. 2. Action of a special nerve fiber to block the transmission of impulses through a synapse, e.g., gating of pain impulses at synapses in the dorsal horns. 3. A device which can be switched electronically to control the passage of a signal. 4. To use a physiological signal, such as an ECG, to trigger an event such as an x-ray exposure or to partition continuously collected data. See gated radionuclide angiocardiography. SEE ALSO: cardiac gating. [O.E. geat]

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gate 'gāt n a molecule or part of a molecule (as an amino acid sequence in a protein) that acts (as by a change in conformation) in response to a stimulus to permit or block passage through a cell membrane
gate vt, gat·ed; gat·ing to control passage through a cell membrane by way of (a specific channel) by supplying a specific stimulus <a transmembrane ion channel gated by the neurotransmitter acetylcholine> see ligand-gated, voltage-gated

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(gāt) 1. an electronic circuit that passes a pulse only when a signal (the gate pulse) is present at a second input; called also gate circuit. 2. a mechanism for opening or closing a channel in a cell membrane, regulated by a signal such as increased concentration of a neurotransmitter, change in electrical potential, or physical binding of a ligand molecule to the channel protein to cause a conformational change in the protein molecule. 3. to open and close selectively and function as a gate.

Medical dictionary. 2011.

Look at other dictionaries:

  • gâte — gâte …   Dictionnaire des rimes

  • Gate — Gate …   Deutsch Wörterbuch

  • gâte- — ⇒GÂTE , élém. de compos. Élém. initial issu d une forme du verbe gâter et servant à construire des composés dont le 2e terme est un compl. d obj. (pers. ou chose). V. gâte métier, gâte pâte, gâte sauce et aussi : gâte bois, subst. masc. 1. «… …   Encyclopédie Universelle

  • gâté — gâté, ée [ gate ] adj. • de gâter 1 ♦ Abîmé par putréfaction. Fruits gâtés. Dent gâtée. ⇒ carié, malade. 2 ♦ ENFANT GÂTÉ, à qui l on passe tous ses caprices. Fig. Personne capricieuse, habituée à voir satisfaire ses moindres désirs. « C est une… …   Encyclopédie Universelle

  • Gate — (g[=a]t), n. [OE. [yogh]et, [yogh]eat, giat, gate, door, AS. geat, gat, gate, door; akin to OS., D., & Icel. gat opening, hole, and perh. to E. gate a way, gait, and get, v. Cf. {Gate} a way, 3d {Get}.] 1. A large door or passageway in the wall… …   The Collaborative International Dictionary of English

  • gâté — gâté, ée (gâ té, tée) part. passé de gâter. 1°   Qui est ravagé. Le pays gâté par l armée qui l envahit. 2°   Par extension, mis en mauvais état, détérioré. Les chemins gâtés par l ennemi qui se retirait. •   Je veux leur ôter la peine de venir à …   Dictionnaire de la Langue Française d'Émile Littré

  • GATE — (engl. für „Gatter, Tor“) steht für: einen Zugang vom Terminal eines Flughafens zu den Flugzeugen, siehe Flugsteig, den Steueranschluss folgender Halbleiterbauelemente: Feldeffekttransistor, Thyristor, Triac, GTO und IGBT, ein musikalisches… …   Deutsch Wikipedia

  • Gate — (engl. für „Gatter, Tor“) steht für: einen Zugang vom Terminal eines Flughafens zu den Flugzeugen, siehe Flugsteig, den Steueranschluss folgender Halbleiterbauelemente: Feldeffekttransistor, Thyristor, Triac, GTO und IGBT, ein musikalisches… …   Deutsch Wikipedia

  • gate — [geɪt] noun 1. [countable] TRAVEL the door leading to the planes at an airport: • Air France flight 76 will leave from gate 6A. 2. [countable, uncountable] COMMERCE the number of people attending a public place or event such as a football match,… …   Financial and business terms

  • gate — [ geıt ] noun *** 1. ) count a door in a fence or wall that you go through to enter or leave a place: He walked through a wooden gate into the field. Be sure to close the gate to the driveway when you leave. a ) usually plural the entrance to a… …   Usage of the words and phrases in modern English

  • Gate — Gate, n. [Icel. gata; akin to SW. gata street, lane, Dan. gade, Goth. gatw[ o], G. gasse. Cf. {Gate} a door, {Gait}.] 1. A way; a path; a road; a street (as in Highgate). [O. Eng. & Scot.] [1913 Webster] I was going to be an honest man; but the… …   The Collaborative International Dictionary of English

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