NEET 2003 Biology question

If Henle's loop were absent from mammalian nephron, which of the following is to be expected : -

(1)There will be no urine formation
(2)There will be hardly any change in the quality and quantity of urine formed
(3)The urine will be more concentrated
(4)The urine will be more diluteCorrect

Answer: (4)

Solution

The loop of Henle, with the vasa recta, sets up and maintains the osmotic gradient in the medullary interstitium by the counter-current mechanism. This gradient allows water to be reabsorbed from the collecting duct, producing concentrated (hypertonic) urine. Without the loop of Henle the

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Question ID VK-089244