Which of the following statements

Question

A) urine is hypertonic in proximal convulated  tubule

B) when the urine passes into collecting tubule, it becomes hypotonic

C) urine becomes more and more hypotonic as it passes through henles loop

D) urine is isotonic  in PCT

 Identify  the incorrect  one (only option is correct). Give details why they are incorrect  statements.

Answer 1

Only option (D) is correct and rest are incorrect statement.

Explanation:

The filtrate is isotonic to blood plasma (in proximal convulated tubule) and the filtrate becomes hypertonic to blood plasma (in descending limb of loop of Henle). The filtrate is hypotonic to blood plasma (in ascending limb of loop of Henle) in distal convulated tubule. ADH make the filtrate isotonic to blood plasma.