Question

In which segment of nephron, reabsorption is minimum?

• A. Proximal convoluted tubule (PCT)
• B. Distal convoluted tubule (DCT)
• C. Loop of Henle
• D. Both A and B

Answer 1

Answer: (C)

Loop of Henle

A) The PCT reabsorbs $NaCl$, $H_{2}O$, ${HCO}_3^{-}$, $K^{+}$ and nutrients.

B) The DCT reabsorbs $NaCl$, $H_{2}O$ and ${HCO}_3^{-}$.

C) A loop of Henle reabsorbs water in the descending limb but is also impervious to water in the ascending limb, diluting the urine. So, the net reabsorption is minimum.
D) Both PCT and DCT contribute significantly to reabsorption.
So, the correct answer is option C.