Question

A and B are two pairs of glands that are present in the human endocrine system. The pair A is found only in females, whereas B is present only in males. Glands A make and secrete two hormones C and D, whereas glands B make and secrete only one hormone E. In addition to hormones, Glands A make gametes F, whereas glands B make gametes G.
(a) What are the glands A?
(b) What are the hormones C and D?
(c) What are the glands B? Name the hormone E.
(d) What are the gametes F and G?
(e) Which event in the life of males and females is associated with the secretion of the hormones C, D and E?

Answer 1

1. The glands A are the ovaries.
2. The hormones C and D, secreted by the ovaries, are oestrogen and progesterone, respectively.
3. The glands B are the testes. The hormone E, released by the testes, is testosterone.
4. (i) The gametes F are ova or eggs. They are produced by the ovaries.

(ii) The gametes G are sperms. Sperms are produced by the testes.

5. The secretion of hormones C (oestrogen) and D (progesterone) in females and hormone E (testosterone) in males are associated with puberty.