calcium channel
Membrane channel that is specific for calcium. Probably the best characterized is the voltage-gated channel of the sarcoplasmic reticulum which is ryanodine-sensitive. See voltage-sensitive calcium channels.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • Calcium channel — A Calcium channel is an ion channel which displays selective permeabiltiy to calcium ions. It is sometimes synonymous as voltage dependent calcium channel, [DorlandsDict|two/000019812|calcium channel] although there are also ligand gated calcium… …   Wikipedia

  • calcium channel — a voltage gated channel, very permeable to calcium ions and slightly permeable to sodium ions, that upon activation by membrane depolarization allows calcium to flow into the cell; channels are classified into six subtypes (L, N, P, Q, R, and T)… …   Medical dictionary

  • calcium channel blocker — n any of a class of drugs (as verapamil) that prevent or slow the influx of calcium ions into smooth muscle cells esp. of the heart and that are used esp. to treat some forms of angina pectoris and some cardiac arrhythmias called also calcium… …   Medical dictionary

  • calcium channel blocker — n. any of a class of drugs, including nifedipine, diltiazem, and verapamil, that relax vascular and other smooth muscle tissue by preventing calcium ions from entering their cells, used to treat headaches, high blood pressure, angina pectoris,… …   Universalium

  • calcium channel blocker — n. any of a class of drugs, including nifedipine, diltiazem, and verapamil, that relax vascular and other smooth muscle tissue by preventing calcium ions from entering their cells, used to treat headaches, high blood pressure, angina pectoris,… …   English World dictionary

  • calcium-channel blocker — calcium antagonist a drug that inhibits the influx of calcium ions into cardiac and smooth muscle cells; it therefore reduces the strength of heart muscle contraction, reduces conduction of impulses in the heart, and causes vasodilatation.… …   The new mediacal dictionary

  • Calcium channel blocker — A calcium channel blocker (CCB) is a chemical that disrupts the movement of calcium (Ca2+) through calcium channels.[1] CCB drugs devised to target neurons are used as antiepileptics. However, the most widespread clinical usage of calcium channel …   Wikipedia

  • calcium channel blocking agent — any of a group of drugs that inhibit the entry of calcium into cells or inhibit the mobilization of calcium from intracellular stores, resulting in slowing of atrioventricular and sinoatrial conduction and relaxation of arterial smooth and… …   Medical dictionary

  • calcium-channel blocker — noun any of a class of drugs that block the flow of the electrolyte calcium (either in nerve cell conduction or smooth muscle contraction of the heart); has been used in the treatment of angina or arrhythmia or hypertension or migraine • Syn:… …   Useful english dictionary

  • calcium channel blocker — noun or calcium blocker : any of a class of drugs (as verapamil) that prevent or slow the influx of calcium ions into smooth muscle cells especially of the heart and that are used especially to treat some forms of angina pectoris and some cardiac …   Useful english dictionary

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