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← Human Body & HealthIf a hiker's core body temperature drops significantly in cold conditions, which consequence follows regarding thermoregulation?
A)Sweat gland activity increases rapidly
B)Shivering thermogenesis becomes predominant✓
C)Vasodilation reduces core heat loss
D)Hypothalamic set point temperature rises
💡 Explanation
Shivering thermogenesis becomes the primary mechanism because the hypothalamus detects the temperature drop and triggers involuntary muscle contractions to generate heat. Therefore, shivering is the dominant response, rather than sweating, vasodilation, or raising the set point, which are counterproductive in this situation.
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