Q:

Where does the actual gas exchange between inspired air and the blood in the capillaries occur? In the:

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Where does the actual gas exchange between inspired air and the blood in the capillaries occur? In the: 


  1. bronchi
  2. bronchioles
  3. alveolar ducts and alveoli
  4. respiratory bronchioles.

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C: Gas exchange occurs across the respiratory membrane of the alveoli and ducts.  

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