What is the main role of angiotensin II?
Angiotensin 2 has 2 principal effects that can elevate aerial pressureVasoconstriction in many areas of body ie increases total peripheral resistance.Decreased excretion of salt and water.Angiotensin 2 constricts both afferent and efferent aerioles but efferent aeriole is more sensitive and hence constriction of efferent aeriole predominates.Angiotensin 2 causes release of aldosterone from adrenal glandsRef: Guyton and Hall, Textbook of medical physiology, 2nd South Asia Edition, page no. 273Textbook of medical physiology by N Geetha, 3rd edition, page no. 384
Increased TPR
Constriction of afferent renal aeriole
Decrease release of aldosterone
Diuresis
Cardiovascular system