If a hiker experiences heatstroke, developing a core body temperature of 106°F (41.1°C) despite sweating profusely and drinking water, which mechanism most likely explains the breakdown of thermoregulation?

💡 Explanation

Heatstroke, despite sweating, often indicates a failure of the hypothalamus to regulate the body's set point because the excessive heat overwhelms the thermoregulatory system; therefore, the hypothalamic set-point malfunction is the core issue, rather than merely peripheral responses like ADH or sympathetic activation.

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