Question

The nephrons in adult human metanephric kidney are 1 million per kidney, whereas in pronephric kidney of embryo of human, number is .......... per kidney.

• A. 100
• B. 1000
• C. 40
• D. 10

Answer 1

Answer: (C)

40

The development of the kidney proceeds through a series of successive phases, each marked by the development of a more advanced kidney: the pronephros, mesonephros, and metanephros. The pronephros is the most immature form of the kidney, while the metanephros is most developed. The metanephros persists as the adult kidney. During approximately day 22 of human gestation, the paired pronephric kidney appear towards the cranial end of the intermediate mesoderm. The number of the nephron in the pronephric kidney in human is about 40 and mesonephric is about 34.