Which of the following animals is not ectothermic?
Correct answer: C. Polar bear
- A. Salamander
- B. Great white shark
- C. Polar bear
- D. Butterfly
Explanation
Polar bears are classified as endothermic animals because they can regulate their body temperature internally, independent of external conditions. Salamanders, great white sharks, and butterflies are all ectothermic animals, meaning they rely on external sources for body temperature regulation.
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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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