Question

Hormone causing release of milk during suckling of baby is

• A. Prolactin
• B. Calcitonin
• C. Oxytocin
• D. Adrenaline

Answer 1

The correct option is C Oxytocin

Oxytocin is an oligopeptide hormone secreted by pars nervosa of pituitary glands of birds and mammals and is involved in contraction of alveoli of mammary glands during release of milk. Prolactin is a protein gonadotrophic hormone secreted by anterior pituitary gland and promotes secretion of progesterone and also helps in lactation. Adrenaline is secreted by the adrenal gland. Calcitonin of polypeptide hormone is secreted by C (parafollicular cells) cells of thyroid gland, and sometimes of the thymus and parathyroids which lowers plasma calcium and phosphate levels, and inhibit bone resorption.