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प्रश्न
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?
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उत्तर
- The glands A are the ovaries.
- The hormones C and D, secreted by the ovaries, are oestrogen and progesterone, respectively.
- The glands B are the testes. The hormone E, released by the testes, is testosterone.
- (i) The gametes F are ova or eggs. They are produced by the ovaries.
- The secretion of hormones C (oestrogen) and D (progesterone) in females and hormone E (testosterone) in males are associated with puberty.
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| (i) Thyroxine | (a) Causes breasts to develop in females |
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| (iii) Insulin | (c) Prepares the body for an emergency |
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