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Solution


Q.

Identify the hormone with its correct matching of source and function.               [2014]
1 Oxytocin - posterior pituitary, growth and maintenance of mammary glands.  
2 Melatonin - pineal gland, regulates the normal rhythm of sleepwake cycle.  
3 Progesterone - corpus luteum, stimulation of growth and activities of female secondary sex organs.  
4 Atrial natriuretic factor - ventricular wall, increases the blood pressure.  

Ans.

(2)

Oxytocin is produced by hypothalamus and generally secreted by posterior pituitary. It stimulates ejection of milk from mammary glands; causes contraction of uterus at the time of child birth.
Progesterone is secreted by corpus luteum. It stimulates uterus for pregnancy, implantation, formation of placenta and development of mammary glands.

Atrial natriuretic factor is secreted by atrial wall in response to an increased return of the venous blood. This hormone reduces blood pressure.