Anatomy & Embryology
Milk ejection reflex is by: (AIIMS Nov 2012)
1. Oxytocin stimulates uterine contractions and milk ejection. It acts on the membranes of myometrial and myoepithelial cells to cause an increased force of contraction.
2. Oxytocin also exerts a contractile action on the myometrium postpartum and causes contraction of the myoepithelial cells of the mammary alveoli, causing them to expel milk from the secretory tissue to the nipple.
3. Oxytocin is 100 times more potent than vasopressin in its milk-ejecting activity.