... English dictionary definition of angiotensin II. Angiotensin receptor blockers (also called ARBs or angiotensin II inhibitors) are medicines that dilate (widen) blood vessels, and are used in the treatment of conditions such as high blood pressure (hypertension), heart failure, or kidney disease in people with diabetes.. Define angiotensin II. sin II (an'jē-ō-ten'sin), A vasoactive octapeptide produced by the action of angiotensin-converting enzyme on angiotensin I; produces stimulation of vascular smooth muscle, promotes aldosterone production, and stimulates the sympathetic nervous system. Angiotensin II regulates blood pressure and fluid and electrolyte homeostasis through various actions. See more. See more. Medical definition of angiotensin II: a protein with vasoconstrictive activity that increases blood pressure, stimulates the release of aldosterone, is composed of a chain of eight amino acid residues, and is the physiologically active form of angiotensin. Angiotensin-converting enzyme (ACE) inhibitors help relax your veins and arteries to lower your blood pressure. angiotensin (ˌændʒɪəˈtɛnsɪn) n (Biochemistry) a peptide of … [angio- + tens(ion) + -in.] angiotensin (ˌændʒɪəˈtɛnsɪn) n (Biochemistry) a peptide of … Angiotensin definition is - either of two forms of a kinin of which one has marked vasoconstrictive action; also : a synthetic amide derivative of the physiologically … Angiotensin II is an octapeptide resulting from ACE-mediated cleavage of angiotensin I. Angiotensin II is a short-lived molecule (half-life = 15 seconds), 16 the actions of which are mediated through membrane receptors. Angiotensin II. ARBs work by blocking the action of a natural chemical called angiotensin II. See more. angiotensin II synonyms, angiotensin II pronunciation, angiotensin II translation, English dictionary definition of angiotensin II. angiotensin: (ACE) [ an″je-o-ten´sin ] a vasoconstrictive substance formed in the blood when renin is released from the juxtaglomerular apparatus in the kidney. sin (ăn′jē-ō-tĕn′sĭn) n. Any of several polypeptide hormones, designated by Roman numerals, that are involved in the regulation of blood pressure, especially one of them, angiotensin II, which is a strong vasopressor. angiotensin ii receptor blockers are a group of drugs used to treat high blood pressure and heart failure.. ACE inhibitors prevent an enzyme in your body from producing angiotensin II, a substance that narrows your blood vessels. Angiotensin II receptor blockers help relax your veins and arteries to lower your blood pressure and make it easier for your heart to pump blood.

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