A hiker becomes severely dehydrated during a strenuous climb in hot weather. Why does their sweat production eventually decrease, despite a rising core temperature?

💡 Explanation

Sweat production decreases due to hypovolemia. Because the body prioritizes blood pressure maintenance to protect vital organs, fluid is conserved. Therefore, sweat glands receive less fluid, limiting sweat production, rather than osmoreceptors controlling ADH release dominating at this stage.

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