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Unformatted text preview: -Angiotensin-Aldosterone
• 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…
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.
- Spring '14