Why does persistent hyperthermia overwhelm the human body's thermoregulation despite intact sweating mechanisms during prolonged exertion?

💡 Explanation

Hyperthermia overwhelms thermoregulation because the environmental capacity to absorb evaporated sweat reaches its limit, thereby impeding further heat dissipation. This occurs because high humidity reduces the sweat's ability to evaporate, therefore conductive and convective heat loss diminishes, rather than vasoconstriction or increased shivering.

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