RAAS

renin release

Triggered by low blood pressure or low sodium

renin release

Juxtaglomerular cells release renin into the bloodstream

angiotensin conversion

Renin acts on angiotensinogen (produced by the liver) to form angiotensin I

angiotensin activation

Angiotensin l is converted into angiotensin Il by angiotensin-converting enzyme (ACE), mainly in the lungs

effects of angiotensin 2

Constricts blood vessels to increase blood pressure

effects of angiotensin 2

Stimulates the adrenal gland to release aldosterone

aldosterone action

Signals the kidneys to retain sodium and water, increasing blood volume

adh role

Promotes water reabsorption in the collecting ducts of the kidneys

restoration of homeostasis

Through these actions, RAAS restores blood pressure and fluid balance to normal levels