Renin Aldosterone Angiotensin: The renin-angiotensin-aldosterone system (RAAS) regulates blood pressure and fluid balance by promoting vasoconstriction and sodium retention in response to decreased blood volume or pressure.
Blood Volume Loss and Homeostasis: When blood volume drops due to bleeding or dehydration, homeostasis is maintained through vasoconstriction, increased heart rate, and hormone release (ADH, aldosterone) to restore volume and pressure.
Renin Angiotensin Aldosterone Pathway: This hormonal cascade begins with renin release from the kidneys, leading to the formation of angiotensin II, a potent vasoconstrictor, and the secretion of aldosterone, which promotes sodium and water retention.
