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Which of the following statements is/are incorrect regarding the collecting duct?
(i) It extends from the cortex to medulla
(ii) Large amount of water could be reabsorbed by it to produce concentrated urine.
(iii) Small amount of urea diffuses into it from the medulla to keep up the osmolarity.
(iv) It plays a role in maintaining pH and ionic balance of blood by the selective secretion of H+ and K+ ions.
Only (i)
Only (iii)
(ii) and (iii)
(i) and (iv)
Answers (1)
As we learn
Collecting Duct -
This long duct extends from the cortex of the kidney to the inner parts of the medulla.
- wherein
Large amounts of water could be reabsorbed from this region to produce a concentrated urine. This segment allows passage of small amounts of urea into the medullary interstitium to keep up the osmolarity. It also plays a role in the maintenance of pH and ionic balance of blood by the selective secretion of H+ and K+ ions.
Correct option is 2
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