Question

Which of the following is/are functions of angiotensin II?

• A. Vasoconstriction of blood vessels
• B. Triggers adrenal glands to produce aldosterone
• C. Increases blood pressure and GFR
• D. All of the above

Answer 1

The correct option is D All of the above

When there is a fall in glomerular blood flow/glomerular blood pressure/GFR it activates the JG cells to release renin which converts angiotensinogen in blood to angiotensin I and further to angiotensin II.
Angiotensin II is a powerful vasoconstrictor and in this process increases the glomerular blood pressure and thereby GFR. Angiotensin II also activates the adrenal cortex to release Aldosterone. Aldosterone causes reabsorption of Na+ and water from the distal parts of the tubule. This also leads to an increase in blood pressure and GFR.