[A]: The regulation of RBC production is ac complished by the hormone FSH.
[R]: This hormone circulates to red bone marrow where it increases stem cell mitosis and speed up the RBC development.

Options

A. If both the assertion and reason are true and reason is correct explanation of the assertion .
B. If both the assertion and reason are true but reason is not a correct explanation of the assertion .
C. If the assertion is true but the reason is false.
D. If both assertion and reason are false.

Answer

A

Explanation

The regulation of RBC production is accomplished by the hormone erythropoietin which is secreted by the juxtaglomerular cells of kidney . This hormone circulates to the red bone marrow , where it increases stem cell ( myoblasts ) mitosis and speeds the development of red blood cells. The sequence is myoblast ` to` proerythroblast ` to` erythroblat ` to` normoblast ( metaerythroblast ) ` to` reticulocyte `to` erythrocytes.