What role do myoepithelial cells play during breastfeeding?

Myoepithelial cells play a crucial role in the process of breastfeeding by facilitating the milk ejection reflex, also known as the let-down reflex. Located between the basement membrane and the mammary epithelial cells in the breast, these contractile cells respond to hormonal stimuli, particularly oxytocin, during breastfeeding. When a baby latches and suckles, sensory signals are sent to the mother's brain, triggering the release of oxytocin. This hormone causes the myoepithelial cells to contract, squeezing the milk from the alveoli into the ducts, allowing it to flow towards the nipple for the infant to consume.

Understanding the role of myoepithelial cells in milk ejection highlights their importance in successful breastfeeding. While other options mention functions such as absorbing milk or producing breast milk, these activities are not related to myoepithelial cells. The process of milk production occurs in the alveolar cells of the mammary glands, and absorption of breast milk is a function performed by the infant, not the cells within the breast. Thus, emphasizing the function of myoepithelial cells in stimulating the let-down reflex underscores their critical part in the breastfeeding process.