Which hormone causes the milk ejection (milk let-down)reflex?
A)prostaglandins
B)human placental lactogen
C)prolactin
D)placental prolactin
E)oxytocin

Question

Quizplus · Accepted Answer

The hormone that causes milk ejection or milk let-down reflex is oxytocin. This hormone is released from the posterior pituitary gland in response to baby's sucking or nipple stimulation. Oxytocin causes the muscle cells surrounding the milk ducts in the breast to contract and push the milk out into the milk ducts and eventually to the nipple for the baby to suckle. Prostaglandins, human placental lactogen, prolactin, and placental prolactin do not directly cause milk ejection but have other roles in lactation.

Which Hormone Causes the Milk Ejection (Milk Let-Down)reflex