EVERYDAY SCIENCE

SCIENCE

ENDOCRINE GLANDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The expulsion of milk form the breast during suckling is brought about by.
A
Prolactin
B
Oxytocin
C
Vasopressin
D
Estrogen and progesterone
Explanation: 

Detailed explanation-1: -The oxytocin reflex is also sometimes called the “letdown reflex” or the “milk ejection reflex”. Oxytocin is produced more quickly than prolactin. It makes the milk that is already in the breast flow for the current feed, and helps the baby to get the milk easily.

Detailed explanation-2: -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.

Detailed explanation-3: -Stage two lactogenesis: This stage starts about two or three days postpartum (after giving birth). It’s when milk production intensifies. Once your baby and placenta are delivered, a sudden drop in your estrogen and progesterone causes the hormone prolactin to take over. Prolactin is the hormone that produces milk.

Detailed explanation-4: -Prolactin contributes to hundreds of physiologic functions, but the two primary responsibilities are milk production and the development of mammary glands within breast tissues. Prolactin promotes the growth of mammary alveoli, which are the components of the mammary gland, where the actual production of milk occurs.

There is 1 question to complete.