renin-angiotensin system

renin-angiotensin system
(RAS), renin-angiotensin-aldosterone system (RAAS) the regulation of sodium balance, fluid volume, and blood pressure by renal secretions: in response to reduced perfusion, renin is secreted, which hydrolyzes a plasma globulin to release angiotensin I, which is rapidly hydrolyzed to angiotensin II; this in turn stimulates aldosterone secretion, which brings about sodium retention, increase in blood pressure, and restoration of renal perfusion, which shuts off the signal for renin release.

Medical dictionary. 2011.

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  • Renin-angiotensin system — The renin angiotensin system (RAS) or the renin angiotensin aldosterone system (RAAS) is a hormone system that regulates blood pressure and water (fluid) balance. When blood pressure is low, the kidneys secrete renin. Renin stimulates the… …   Wikipedia

  • Renin-Angiotensin-System — Das Renin Angiotensin Aldosteron System (Abk. RAAS) ist eine Kaskade von verschiedenen Hormonen und Enzymen, die im wesentlichen den Salz und Wasserhaushalt des Körpers steuern. Zusätzlich ist RAAS eines der wichtigsten blutdruckregulierenden… …   Deutsch Wikipedia

  • renin-angiotensin system — ▪ physiology       physiological system that regulates blood pressure.        renin is an enzyme secreted into the blood from specialized cells (cell) that encircle the arterioles at the entrance to the glomeruli of the kidneys (kidney) (the… …   Universalium

  • Renin-Angiotensin-Aldosteron-System — Das Renin Angiotensin Aldosteron System (Abk. RAAS) ist ein Regelkreislauf von verschiedenen Hormonen und Enzymen, die im Wesentlichen den Salz und Wasserhaushalt des Körpers steuern. Zusätzlich ist RAAS eines der wichtigsten… …   Deutsch Wikipedia

  • Renin-Angiotensin-Aldosteron-Mechanismus — Das Renin Angiotensin Aldosteron System (Abk. RAAS) ist eine Kaskade von verschiedenen Hormonen und Enzymen, die im wesentlichen den Salz und Wasserhaushalt des Körpers steuern. Zusätzlich ist RAAS eines der wichtigsten blutdruckregulierenden… …   Deutsch Wikipedia

  • Angiotensin — causes blood vessels to constrict, and drives blood pressure up. It is part of the renin angiotensin system, which is a major target for drugs that lower blood pressure. Angiotensin also creates aldosterone, which causes the tubules of the… …   Wikipedia

  • Renin — Bändermodell des Renin Dimers nach PDB  …   Deutsch Wikipedia

  • Angiotensin II receptor type 1 — Angiotensin II receptor, type 1 or AT1 receptor is an angiotensin receptor. It has vasopressor effects and regulates aldosterone secretion. It is an important effector controlling blood pressure and volume in the cardiovascular system.It is the… …   Wikipedia

  • Angiotensin II — Kalottenmodell nach PDB  …   Deutsch Wikipedia

  • Angiotensin II receptor antagonist — Angiotensin II receptor antagonists, also known as angiotensin receptor blockers (ARBs), AT1 receptor antagonists or sartans, are a group of pharmaceuticals which modulate the renin angiotensin aldosterone system. Their main use is in… …   Wikipedia

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