Panting is a representative of which mechanism?
Correct answer: C. Evaporative cooling.
- A. Pigmentation.
- B. Respiration.
- C. Evaporative cooling.
- D. Excretion.
Explanation
Panting increases evaporation of water from the respiratory passages, and evaporation removes heat from the body. It is therefore a form of evaporative cooling, especially important in dogs and some other mammals. Students may choose respiration because panting involves rapid breathing, but its thermoregulatory purpose is cooling rather than gas exchange alone.
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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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