Which of the following functions of the Sertoli cells mediates negative feedback control of follicle-stimulating hormone (FSH) secretion?
ক
ক) Synthesis of inhibin
খ
খ) Synthesis of testosterone
গ
গ) Aromatization of testosterone
ঘ
ঘ) Maintenance of the blood–testes barrier
ব্যাখ্যা
Inhibin is produced by the Sertoli cells of the testes when they are stimulated by follicle-stimulating hormone (FSH). Inhibin then inhibits further secretion of FSH by negative feedback on the anterior pituitary. The Leydig cells synthesize testosterone. Testosterone is aromatized in the ovaries.
৫.
The two testes of the human adult form up to -
ক
ক) 110 million sperm each day
খ
খ) 120 million sperm each day
গ
গ) 130 million sperm each day
ঘ
ঘ) 140 million sperm each day
ব্যাখ্যা
The two testes of the human adult form up to 120 million sperm each day.