What is the function of myoepithelial cells in breast tissue?

Myoepithelial cells play a crucial role in breast tissue physiology, particularly during lactation. These specialized cells are located between the basement membrane and the epithelial cells of the mammary ducts and alveoli. Their primary function is to contract in response to hormonal stimulation, specifically oxytocin, which leads to the expulsion of milk from the glandular tissue into the ducts during breastfeeding.

In addition to their role in milk ejection, myoepithelial cells provide structural support to the surrounding epithelial cells. They help maintain the integrity and function of the mammary gland by creating a supportive environment that allows for effective secretion and transport of milk. This dual role of contraction and structural support is vital for the proper functioning of breast tissue, particularly during lactation.

The other options do not accurately describe the role of myoepithelial cells. Regulation of blood flow typically involves vascular smooth muscle rather than myoepithelial cells, while secretion of lactation hormones is primarily the function of endocrine glands like the pituitary and not myoepithelial cells. The generation of nerve signals is a function associated with nerve cells, not myoepithelial cells. Thus, the role of myoepithelial cells in contraction and support