Excretory Products And Their Elimination Ques 21
21. Which of the following statements is correct?
[2017]
(a) The descending limb of loop of Henle is impermeable to water.
(b) The ascending limb of loop of Henle is permeable to water.
(c) The descending limb of loop of Henle is permeable to electrolytes.
(d) The ascending limb of loop of Henle is impermeable to water.
Show Answer
Answer : d
Hints & Solutions
(d) Descending limb of loop of Henle is permeable to water but impermeable to electrolytes whereas ascending limb is impermeable to water but permeable to electrolytes. The descending loop of Henle receives isotonic ( $300 mOsm / L)$ fluid from the proximal convoluted tubule (PCT). Substances reabsorbed in the PCT include urea, water, potassium, sodium, chloride, glucose, amino acids, lactate, phosphate, and bicarbonate.
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