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Reabsorption of useful substances back i...

Reabsorption of useful substances back into blood from the filtrate in a nephron occurs in:

A

collecting tube

B

loop of Henle

C

proximal convoluted tubule

D

distal convoluted tubule

Text Solution

Verified by Experts

The correct Answer is:
C
Proximal convoluted tubule is the main site for the reabsorption of useful substances from glomerular filrtate. In PCT complete reabsorption by active transport takes place for glucose. PCT reabsorbs most of the amino acids and vitamin-C about 70% of `Na^(+)` and nearly 75% of `K^(+)` and a large amount of `Ca^(2+)` from glomerular filtrate. `Cl^(-)` is reabsorbed by diffusion. 70% of water from filtrate is also reabsorbed in PCT by osmosis.
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