Q.

Active reabsorption of Na+ occurs in all the following parts of nephron, except

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a

ascending limb of Henle’s loop

b

proximal convoluted tubule

c

descending limb of Henle’s loop

d

distal convoluted tubule

answer is C.

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Detailed Solution

The descending limb of loop of Henle is permeable to water but almost impermeable to electrolytes. Water moves out of it and small amounts of NaCl and urea move into it. Na+ is actively reabsorbed in the PCT, thick ascending limb and the DCT.

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Active reabsorption of Na+ occurs in all the following parts of nephron, except