During prolonged exertion in a desert environment, what distinguishes the body's core temperature increasing above its hypothalamic set point, causing heatstroke, from successful thermoregulation?

💡 Explanation

Heatstroke happens when the evaporative heat loss via sweat glands cannot match the metabolic rate, because ambient humidity reduces sweat evaporation and radiative heat transfer is insufficient. Therefore, body temperature rises above the hypothalamic set point, rather than maintaining a stable core temperature via successful thermoregulation.

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