Which mechanism is listed as a heat loss mechanism during fever besides sweating?

Which mechanism is listed as a heat loss mechanism during fever besides sweating?

• A. Blood vessels near the skin dilate
• B. Constricting blood vessels
• C. Shivering
• D. Increasing metabolic rate

Answer: (A)

When fever needs to be cooled, the body increases heat loss by widening the skin’s blood vessels (cutaneous vasodilation). This brings more warm blood to the surface, allowing heat to escape to the environment through radiation and convection, and it often accompanies sweating. The other options don’t fit heat loss: constricting blood vessels would reduce heat loss; shivering and increasing metabolic rate generate more heat rather than remove it.

When fever needs to be cooled, the body increases heat loss by widening the skin’s blood vessels (cutaneous vasodilation). This brings more warm blood to the surface, allowing heat to escape to the environment through radiation and convection, and it often accompanies sweating. The other options don’t fit heat loss: constricting blood vessels would reduce heat loss; shivering and increasing metabolic rate generate more heat rather than remove it.