NEET Zoology Regulation of Kidney Function MCQ Question
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 control 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.
Three statements are correct
Four statements are correct
Five statements are correct
Two statements are wrong
Correct Answer
Detailed Explanation
Statements (i), (ii), (iii), (iv) are correct as they describe the renin-angiotensin system accurately, which regulates blood pressure and GFR. Statement (v) is incorrect because it is angiotensin II, not I, that stimulates aldosterone release.
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