Bloodstream, lung endothelium and adrenal cortex

Renin-angiotensin-aldosterone system

Low blood pressure in, sodium and water back.

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this pathway
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Net yieldVasoconstriction, then sodium and water retained
Rate-limitingRenin
Steps3
Irreversible2 of 2 reactions
The order
RAAS spells its own order: Renin → Angiotensin I → (ACE) → Angiotensin II → Aldosterone
What aldosterone does
Aldosterone saves salt, and where sodium goes, water flows