Question

Refer the following features.
I. Adenohypophysis produces gonadotropins.
II. Besides Sex cells, hormones are also produced by testis and ovary.
III. Testosterone is produced by Leydig's cells.
IV. Oestrogen is produced by the ovary.
Which of the above factors influence secondary sexual characters?

• A. III and IV
• B. II, III and IV
• C. II and IV
• D. All of the above

Answer 1

The correct option is D All of the above

Secondary sexual characters are caused by the male and female hormones Testosterone and Oestrogen respectively.

The adenohyphophysis or the pituitary gland produces gonadotropins (FSH and LH) which stimulate the male and female reproductive organs to produce hormones. In females, they are responsible for the production of oestrogen and progesterone which control the menstrual cycle and also are responsible for the secondary sexual characters during puberty.

In males, FSH stimulates the formation of spermatozoa and LH stimulates the Leydig cells to produce testosterone, the male hormone.

So, the correct answer is option D.