Hummingbirds belong to the category:
Correct answer: A. Heterotherms
- A. Heterotherms
- B. Endotherms
- C. Ectotherms
- D. None of these
Explanation
Heterotherms are those animals who are capable of varying degrees of endothermic heat production but generally do not regulate their body temperature within a narrow range.
This question appeared on the UHS MDCAT 2008 paper, which you can sit online with every answer explained.
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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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Which of the following animals is not ectothermic?