A hormone in the body that raises blood pressure by causing blood vessels to constrict and stimulating the kidneys to retain salt and water.
From Greek 'angion' (vessel) + 'tensio' (tension/pressure) + '-in' (chemical compound). The term was coined in the 1950s when scientists discovered this powerful blood-pressure-regulating hormone.
Angiotensin is like your body's emergency pressure valve—when blood pressure drops dangerously, angiotensin kicks in to tighten vessels and save your life, which is why blocking it helps treat hypertension!
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