The first physiological response to high environmental temperature is_______________?
Correct answer: C. Vasodilatation
- A. Sweating
- B. Decrease heat production
- C. Vasodilatation
- D. Non- shivering thermogenesis
Explanation
Cutaneous vasodilatation is the earliest response to heat because it increases blood flow to the skin and promotes heat loss; sweating follows as an additional cooling mechanism.
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