Question

define hormone write four characterstics of hormones in humans

Answer 1

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.

Answer 2

hormones are the secretions of endocrine glands which are helpful in homeostasis
growth hormone
oxytocin
prolactin
thyroid stimulating hormone