What occurs to the arterioles in the skin when the body temperature increases?

When body temperature rises, the body employs a mechanism known as vasodilation, particularly in the arterioles of the skin. This physiological response increases blood flow to the surface of the skin, allowing more blood to come into contact with the cooler air outside. As the blood vessels widen, heat can be dissipated more effectively through the skin, facilitating thermoregulation and helping to cool down the body.

This response is critical for maintaining homeostasis, as it seeks to lower body temperature back to a normal range after the increase. The increased blood flow not only helps with heat loss but also supports the activity of sweat glands, which further aids in cooling through the evaporation of sweat.