Final answer:
Nitric oxide is produced vasodilation through thermoreceptors in the skin.
Step-by-step explanation:
Vasodilation through thermoreceptors in the skin is primarily orchestrated by the sympathetic nervous system. When thermoreceptors detect an increase in body temperature, they relay signals to the hypothalamus, which, in turn, triggers sympathetic neurons to release neurotransmitters like nitric oxide.
Nitric oxide promotes vasodilation by relaxing smooth muscle cells in blood vessel walls, expanding vessel diameter. This physiological response facilitates increased blood flow to the skin's surface, promoting heat dissipation through radiation and aiding in temperature regulation. This finely tuned mechanism helps the body dissipate excess heat during conditions like exercise or exposure to a warm environment, preventing overheating.