During prolonged strenuous exercise in hot weather, the body's thermoregulation system can fail. Which outcome becomes likely as the exercise continues?

💡 Explanation

Exertional heat stroke becomes likely because prolonged exertion overwhelms the thermoregulatory mechanisms, especially in the heat. This leads to a loss of hypothalamic control over temperature, therefore heat stroke occurs, rather than merely retaining fluids or shifting fuel metabolism.

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