Which of the following segments can allow the passage of urea through them?(a) Collecting duct(b) PCT(c) DCT(d) Henle’s loopI have been asked this question in a national level competition.My question is from Function of Tubules-2 in division Excretory Products and Elimination of Biology – Class 11

Which of the following segments can allow the passage of urea through

1.	Which of the following segments can allow the passage of urea through them?(a) Collecting duct(b) PCT(c) DCT(d) Henle’s loopI have been asked this question in a national level competition.My question is from Function of Tubules-2 in division Excretory Products and Elimination of Biology – Class 11
Answer» Right ANSWER is (a) Collecting duct For explanation I would SAY: Through the collecting duct, LARGE amounts of water can be reabsorbed to produce concentrated URINE. This segment also allows the passage of small amounts of urea into the medullary INTERSTITIUM to keep up the osmolarity.

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