alpha receptors

alpha receptors
alpha-adrenergic receptors α-adrenergic r's.

Medical dictionary. 2011.

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  • alpha blocker — alpha blocking, adj. Pharm. any of various substances that interfere with the action of the alpha receptors. Also, alpha blocker. Cf. beta blocker. * * * …   Universalium

  • alpha blocker — n. any of a class of drugs used to dilate the blood vessels by blocking the nerve impulses that normally excite the alpha receptors …   English World dictionary

  • alpha-blocker — al·pha block·er (ălʹfə blŏk ər) n. A drug that opposes the excitatory effects of norepinephrine released from sympathetic nerve endings at alpha receptors and that causes vasodilation and a decrease in blood pressure. Also called alpha adrenergic …   Universalium

  • alpha-receptor — al·pha re·cep·tor (ălʹfə rĭ sĕp tər) n. A site in the autonomic nervous system in which excitatory responses occur when adrenergic agents, such as norepinephrine and epinephrine, are released. Activation of alpha receptors causes various… …   Universalium

  • alpha blocker — al′pha block er n. pha any of various substances that interfere with the action of the alpha receptors al′pha block ing, adj …   From formal English to slang

  • Alpha-1 blocker — Alpha 1 blockers (also called alpha adrenergic blocking agents) constitute a variety of drugs which block α1 adrenergic receptors in arteries and smooth muscles.IndicationsThese drugs may be used to treat: * benign prostatic hyperplasia (BPH)cite …   Wikipedia

  • Alpha blocker — Alpha blockers (or adrenergic alpha antagonists) are agents that act as antagonists of alpha adrenergic receptors. [MeshName|alpha Adrenergic+Blockers] ClassificationThey can be divided into two classes. * Alpha 1 blockers act at alpha 1… …   Wikipedia

  • Alpha-2-Macroglobulin — alpha 2 Macroglobulin, also known as α2 macroglobulin and abbreviated as α2M and A2M, is a large plasma protein found in the blood. It is produced by the liver, and is a major component of the alpha 2 band in protein electrophoresis. Structure… …   Wikipedia

  • Alpha cell — Alpha cells are endocrine cells in the islets of Langerhans of the pancreas. They make up 15 20% of the cells in the islets. They are responsible for synthesizing and secreting the peptide hormone glucagon, which elevates the glucose levels in… …   Wikipedia

  • alpha blocker — (alpha adrenergic blocker) a drug that prevents the stimulation of alpha adrenergic receptors at the nerve endings of the sympathetic nervous system by noradrenaline and adrenaline: it therefore causes widening of arteries (vasodilatation) and a… …   Medical dictionary

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