Q.

Medullary gradient is mainly developed due to
 a) NaCl and urea               b) NaCl and glucose
 c) Glucose and urea          d) Ammonia and glucose

1 A
2 B
3 C
4 D

Ans.

(a) Medullary gradient is mainly developed by NaCl and urea and this is developed by counter current mechanism of vasa recta and Henle loop