In the male,
a. fsh is not secreted by the pituitary
b. fsh receptors are located in the leydig cells
c. fsh receptors are located in the spermatogonia
d. fsh receptors are located in the sertoli cells
e. fsh receptors are located in posterior pituitary gland

The correct answer is option d.

Explanation:

FSH or follicle-stimulating hormone refers to a gonadotropin, which is produced and secreted by the anterior pituitary gland's gonadotropic cells. It monitors the growth, development, reproductive procedures, and pubertal maturation of the body.  

In males, FSH instigates Sertoli cells to produce ABPs or androgen-binding proteins, regulated by negative feedback mechanism of inhibin on the anterior pituitary. Mainly, the stimulation of Sertoli cells by FSH maintains spermatogenesis and instigates secretion of inhibin B.  

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