The part of nephron" least permeable to water" is______________?
Correct answer: C. Ascending limb of loop of Henle
- A. Proximal tubule
- B. Descending limb of loop of Henle
- C. Ascending limb of loop of Henle
- D. Collecting tubule
Explanation
The thick ascending limb is effectively impermeable to water while actively reabsorbing NaCl, making it the diluting segment of the nephron. The descending limb and collecting duct can be water-permeable under appropriate conditions.
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