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    GlossaryRenin-Angiotensin System (RAAS)

    hormone system regulating blood pressure and fluid balance

    The Renin-Angiotensin System (RAS), also known as the Renin-Angiotensin-Aldosterone System (RAAS), is a hormone system that regulates blood pressure and fluid balance in the body. When blood pressure drops, the kidneys release the enzyme renin, which triggers a cascade of reactions leading to the production of angiotensin II, a potent vasoconstrictor that increases blood pressure and stimulates the release of aldosterone from the adrenal glands, promoting sodium and water retention.

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