In condition of high temperature, following does not occur or occurs at low level__________?
Correct answer: C. Thermogenesis
- A. Vasodilation
- B. Activation of sweat glands
- C. Thermogenesis
- D. Evaporative cooling
Explanation
At high temperature, the body reduces thermogenesis, or heat production, because producing more heat would raise body temperature further. Vasodilation, sweating and evaporative cooling are increased to remove heat, so the common mistake is choosing vasodilation while confusing heat loss with heat production.
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About Thermoregulation
Thermoregulation maintains body temperature through negative feedback controlled mainly by the hypothalamus. It covers vasodilation and vasoconstriction, sweating, shivering, changes in metabolic heat production and behavioural responses, while distinguishing heat loss by radiation, conduction, convection and evaporation from temperature regulation itself.
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