Case 2 : the biological process involved in the removal of harmful metabolic wastes from the bosy is called excertion .Different organisms use varied strategies to do this Many unicellular organisms remove these wastes by simple diffusion from the body surface into the surrounding water while complex multicellular organisms use specialised organs to perform the same function .
The given figure represent the structure of nephron.

Whihc of the following is responsible for concentrating the solute in the filtrate ?

Options

A. Q
B. S
C. R
D. P

Answer

C

Explanation

In the given diagram ,P is renal artery :Q is proximal convoluted tubule , R is loop of Henle and S is collecting tubule .