Which condition is characterized by elevated core temperature?

• A. Hyperthermia
• B. Fever
• C. Heat Stroke
• D. Frostnip

Answer: (A)

Elevated core temperature from this scenario results from the body's heat-dissipation system being overwhelmed, so heat accumulates without a change in the brain’s thermostat. That is hyperthermia—the temperature rise is due to external heat or excessive heat production rather than a reset of the hypothalamic set-point. Fever, by contrast, involves the hypothalamus raising its set-point in response to infection or inflammation, leading to a temperature increase as the body lags to meet the new target. Heat stroke is a severe, dangerous form of hyperthermia with central nervous system dysfunction and organ injury, not just a mild rise in temperature. Frostnip is a cold injury and does not cause an overall rise in core temperature. So the condition characterized by elevated core temperature here is hyperthermia.