Reference Entry

renin

Michael Kent

in The Oxford Dictionary of Sports Science & Medicine

Third edition

Published in print January 2006 | ISBN: 9780198568506
Published online January 2007 | e-ISBN: 9780191727788
renin

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An enzyme released by the kidneys in response to exercise, stress, low blood pressure, and reduced blood flow. Renin indirectly increases sodium retention and helps to maintain the plasma volume. When blood pressure is decreased, renin reacts with a substance in the liver (angiotensinogen) to produce two different forms of angiotensin that constricts arterioles (increasing blood pressure) and triggers the release of aldosterone (which increases the reabsorption of sodium from the kidney tubule into the blood). This control of blood pressure by the kidney is called the renin-angiotensin mechanism. Overproduction of renin can cause hypertension....

Reference Entry.  96 words. 

Subjects: Sports and Exercise Medicine

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