Question
How does the evaporation of sweat remove heat from the body?
A. Cooling effect when liquid sweat turns into vapor
B. Blocking heat absorption from environment
C. Increasing blood flow to skin surface
D. Reducing metabolic rate instantly
A. Cooling effect when liquid sweat turns into vapor
B. Blocking heat absorption from environment
C. Increasing blood flow to skin surface
D. Reducing metabolic rate instantly
Answers
GPT-5 mini
A. Cooling effect when liquid sweat turns into vapor
Evaporation requires latent heat; when sweat evaporates it absorbs that heat from the skin and blood, lowering body temperature. (Humidity reduces evaporation and thus its cooling effect.) Options B and D are incorrect; C describes a separate heat-loss mechanism (vasodilation brings warm blood to the skin) but isn't the direct mechanism by which evaporation removes heat.
Evaporation requires latent heat; when sweat evaporates it absorbs that heat from the skin and blood, lowering body temperature. (Humidity reduces evaporation and thus its cooling effect.) Options B and D are incorrect; C describes a separate heat-loss mechanism (vasodilation brings warm blood to the skin) but isn't the direct mechanism by which evaporation removes heat.