What does the process of milk let-down involve?

• A. Relaxation of breast tissue
• B. Contraction of breast tissue to release milk
• C. Absorption of milk by the body
• D. Cooling of milk in the ducts

Answer: (B)

The process of milk let-down involves the contraction of breast tissue to release milk. This physiological response is primarily triggered by the hormone oxytocin, which is released in response to suckling or stimulation of the nipples. When oxytocin is released, it causes the myoepithelial cells surrounding the milk-producing alveoli in the breast to contract. This contraction pushes the milk through the ducts toward the nipple, allowing it to be expressed and making it available for the infant.

Understanding this mechanism is crucial for recognizing how breastfeeding works and the physiological responses involved in milk production and ejection. It highlights the importance of hormonal regulation in the breastfeeding process and the need for effective stimulation to facilitate the let-down reflex.