Final answer:
The idea that dermal blood vessels dilate in response to cold is false; they actually constrict to conserve body heat and maintain core temperature.
Step-by-step explanation:
The statement that an individual's dermal blood vessels will dilate to allow more blood to the surface to dissipate more heat when exposed to extremely low air temperatures is false. In reality, the body's response to cold temperatures is the constriction of dermal blood vessels, a process known as vasoconstriction. This mechanism is essential for minimizing heat loss and keeping the body's core temperature stable. When it's cold, the blood vessels constrict, reducing blood flow to the skin to conserve heat for vital organs.