Fishes, most of the invertebrates and amphibians are examples of ________ animals?
Correct answer: B. Ectotherms
- A. Endotherms
- B. Ectotherms
- C. Heterotherms
- D. Homeotherms
Explanation
Ectotherms depend largely on environmental heat to regulate their body temperature, so fishes, most invertebrates and amphibians are ectothermic animals. Endotherms generate substantial internal heat, as mammals and birds do. Homeotherms are animals that maintain a relatively constant body temperature, not the group described here.
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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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