MCQ
The functioning of the kidneys is efficiently monitored and regulated by hormonal feedback mechanisms involving the hypothalamus, JGA and to a certain extent, the heart. From given statements about JGA control, select correct option from below:
(i) It is controlled by Renin-Angiotensin mechanism.
(ii) A fall in glomerular blood flow/glomerular blood pressure/GFR can activate the JG cells to release renin.
(iii) Renin converts angiotensinogen to angiotensin I.
(iv) Angiotensin II. being a powerful vasoconstrictor, increases the glomerular blood pressure and thereby GFR.
(v) Angiotensin I activates the adrenal cortex to release aldosterone.
(vi) 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.
(i) It is controlled by Renin-Angiotensin mechanism.
(ii) A fall in glomerular blood flow/glomerular blood pressure/GFR can activate the JG cells to release renin.
(iii) Renin converts angiotensinogen to angiotensin I.
(iv) Angiotensin II. being a powerful vasoconstrictor, increases the glomerular blood pressure and thereby GFR.
(v) Angiotensin I activates the adrenal cortex to release aldosterone.
(vi) 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.
- A(i), (iii), (v) and (vi)
- B(i), (iv), (v) and (vi)
- ✓(i), (ii), (iii), (iv) and (vi)
- D(ii), (iv), (v) and (vi)
