<prompt> Action of angiotensin 11 includesSystemic vasodilatationSystemic vasoconstrictionRenal vasodilatationReabsorption of sodium ions in proximal renal tubule  <response>: Refer kDT 6e p 481 The renin-angiotensin system RAS plays an impoant role in the regulation of blood pressure. Angiotensin II is the principal effector hormone in the RAS, causing vasoconstriction and increased sodium and water retention, leading to increased blood pressure 