Q:

What is a good defi nition of “internal respiration”?

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What is a good defi nition of “internal respiration”?


  1. A.The exchange of gases between body tissues and capillary blood.
  2. B.Ventilation of the lungs.
  3. C.The production of ATP and CO 2 from small molecules using O 2 .
  4. D.The exchange of gases between the alveoli and pulmonary capillaries.

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A: Choice C refers to cellular respiration, Choice D to external respiration. 

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