| (i) Urine is hypertonic in distal convoluted tubule. |
| (ii) When the urine passes into collecting tubule, it becomes hypotonic. |
| (iii) Urine is isotonic in proximal convoluted tubule. |
| (iv) Urine becomes more and more hypotonic as it passes through Henle's loop. |
A) (i) and (iv)
B) (i), (ii) and (iii)
C) (ii) and (iii)
D) (iii) only
Correct Answer: D
Solution :
[d] The filtrate is isotonic to blood plasma (in proximal convoluted tubule) and the filtrate becomes hypertonic to blood plasma (in descending limb of loop of Henie). The filtrate is hypotonic to blood plasma (in ascending limb of loop of Henie). In distal convoluted tubule ADH make the filtrate isotonic to blood plasma.
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