What is the role of sweat glands during increased body temperature?

The function of sweat glands during increased body temperature is to secrete sweat for cooling the body. When the body temperature rises, whether due to external heat or internal factors such as exercise, the hypothalamus signals the sweat glands to release sweat onto the surface of the skin. As this sweat evaporates, it removes heat from the body, effectively cooling it down. This process is essential for thermoregulation, helping to maintain a stable internal temperature even in hot conditions or during physical activity.

In contrast, the constriction of blood vessels is a mechanism for retaining heat and would not aid in cooling the body. The production of sebum is related to skin lubrication and protection, not temperature regulation. Hormone production does not play a direct role in the acute cooling response from sweat glands. Therefore, the secretion of sweat is vital in helping the body manage heat effectively during increases in body temperature.