| (I) adenohypophysis produces gonadotropins |
| (II) besides sex cells, hormones are also produced by testis and ovary |
| (III) testosterone is produced by leydig cells |
| (IV) estrogen is produced by ovary |
A) III and IV
B) II, III and IV
C) II and IV
D) All of these
Correct Answer: D
Solution :
Gonadotropic hormones (FSH and LH) are secreted by adenohypophysis. FSH stimulates spermatogenesis and development of semineferous tubules in male while formation and growth of ovarian follicle in female. LH causes final maturation of ovarian follicle and ovulation. - The leyding cells of testis secreted male hormones i.e., androgens (testosterone). It is responsible for proper development of secondary sexual characters in male. Estrogen is secreted by Graffeian follicle of ovary. It is responsible for development of secondary sexual characters in female i.e., thin voice, complete development of ovary, oviduct mammary glands etc.
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