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Which of the following statements is/are...

Which of the following statements is/are true
(1) Urine is hypertonic in distal convoluted tubule
(2) When the urine passes into collecting tubule, it becomes hypotonic
(3) Urine is isotonic in proximal convoluted tubule
(4) Urine becomes more and more hypotonic as it passes through Henle's loop

A

1 and 4

B

1, 2 and 3

C

2 and 3

D

3 only

Text Solution

Verified by Experts

The correct Answer is:
D
* The descending limb is permeable to water thus it is hypertonic
* The ascending limb is impermeable to the water and thus filtrate becomes hypotonic.
* In distal convoluted tubule filtrate is nearly isotonic.
* In collecting duct water comes out making the filtrate hypertonic
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