Zoology - Excretory Products and their Elimination Question with Solution | TestHub

In response to decrease in blood pressure or GFR, the kidneys release Renin. Renin acts on the liver and converts angiotensinogen into angiotensin I. In the lungs angiotensin I is converted to angiotensin II with the help of angiotensin converting enzyme. Angiotensin II is a vasoconstrictor and also stimulates the adrenal gland which releases aldosterone. Aldosterone acts on the kidneys and helps in absorption of sodium ions. Thus this mechanism increases blood pressure