What role do Mast cells play in the body?

Mast cells play an integral role in the immune system, primarily involved in inflammatory responses and wound healing. One of their key functions is to keep blood vessels expanded, which is crucial during allergic reactions and in response to certain pathogens. When activated, mast cells release various chemicals, including histamine, which leads to vasodilation (the expansion of blood vessels). This process increases blood flow to the affected area, facilitating the delivery of immune cells and nutrients that aid in healing.

While regulation of metabolism, nerve signal transmission, and hormone production are essential physiological processes in the body, these functions are not directly associated with mast cells. Therefore, the function of maintaining expanded blood vessels aligns with the biological role that mast cells play within the immune response.