Haryana PMT Haryana PMT Solved Paper-2006

  • question_answer
    Part of nephron impermeable to salt:

    A)  distal convoluted tubules

    B)  descending limb of loop of Henle

    C)  assending limb of loop of Henle

    D)  collecting duct

    Correct Answer: B

    Solution :

    In descending limb of loop of Henie, water is reabsorbed due to increasing osmolality of interstitial fluid. Sodium and other solutes are not reabsorbed here. The filtrate become hypertonic to blood plasma. In assending limb of loop of Henie, solutes ( Na, K, Ca, Mg, Cl )are rebsorbed whereas it is impermeable to water. In distal convoluted tubule, there is active reabsorption of sodium ions from the filtrate under the influence of aldosterone. Collecting duct reabsorb the water and also Na+ under the influence of aldosterone.


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