Question

Select the incorrect statement(s) regarding collecting duct.

• A. Collecting duct helps to produce concentrated urine by reabsorbing water
• B. It does not allow the passage of urea across it
• C. It selectively secretes $H ^{+}$and $K ^{+}$ions into medullary interstitium
• D. All of the above

Answer 1

Answer: (B)

Statement in option (b) contains the incorrect statement which can be corrected as
Collecting duct allows the passage of small amount of urea into medullary interstitium so as to maintain the osmolarity of body fluids.
Rest of the statements are correct.