Question

(a) Define hormone. Write any four characteristics of hormones in humans.

(b) Name the disorder caused by following situations

(i) Under secretion of growth hormone.

 (ii) Over secretion of growth hormone.​

Answer 1

(a) Hormones are the chemical substances which co-ordinate and control the activities of living organisms and also their growth. Characterics of hormones are :

(i) They are chemical messengers

(ii) Regulate behaviour of target cells.

(iii) To stimulate the target organs.

(iv) They are proteinaceous or non-proteinaceous in nature.

(b)

(i) Dwarfism

(ii) Tallness

(iii) Diabetes

(iv) Goitre

source : goog.le

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