NEET 2011 Biology question

Which one of the following statements is correct with respect to kidney function regulation ?

(1)When someone drinks lot of water, ADH release is suppressed.Correct
(2)Exposure to cold temperature stimulates formation of Angiotensin II.
(3)An increase in glomerular blood flow stimulates formation of Angiotensin II.
(4)During summer when body loses lot of water by evaporation, the release of ADH is suppressed.

Answer: (1)

Solution

ADH (vasopressin) from the neurohypophysis promotes water reabsorption in the DCT and collecting duct. After drinking a lot of water, body fluid volume/osmolarity falls, osmoreceptors are less stimulated and ADH release is suppressed, giving dilute, plentiful urine. (4) is wrong

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Question ID VK-090887