Renin angiotensin aldosterone renin angiotensin

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Unformatted text preview: -Angiotensin-Aldosterone Renin-Angiotensin-Aldosterone (RAA System) • Low BP (detected in afferent arteriole) releases Renin • Renin is an enzyme – Converts angiotensinogen (plasma protein) – Into angiotensin • Angiotensin helps increase BP in 2 ways – Potent vasoconstrictor – Aldosterone from adrenal cortex • Aldosterone increases sodium reabsorption – increasing extracellular volume including plasma • Aldosterone increases secretion of potassium ion (and H+) H+ is “linked” to other positive ions… H+ especially K+ Cell Shifts Maintain Electrical Balance: Distal Tubule “chooses” which to lose: K+ or H+ H+ K+ Why would K+ depl...
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This document was uploaded on 02/07/2014.

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