A) large volumes of concentrated urine
B) large volumes of dilute urine
C) small volumes of concentrated urine
D) small volumes of dilute urine
Correct Answer: B
Solution :
[b] If the walls of the collecting duct are water- permeable, water leaves the ducts to pass into the hyperosmotic surrounding and concentrated urine is produced. Thus, when there is insufficient ADH, less water is re- absorbed and more dilute urine is produced in copious amounts.
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