Q:

To what does “internal respiration” refer?

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To what does “internal respiration” refer?


  1. inhalation
  2. exchange of gases between alveolar air and blood in the pulmonary capillaries.
  3. exchange of gases between capillary blood and interstitial fl uid.
  4. the production of ATP from organic molecules using oxygen.

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C: Internal respiration refers to the movement of oxygen from the blood into the interstitial fl uid and CO 2 from interstitial fl uid to blood. It also refers to the diffusion of these gases through the interstitial fl uid to and from the cells. 

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