The intra-alveolar pressure is determined by what two factors?
A) quantity of air in the alveolus and volume of the alveoli
B) dead air space and atmospheric pressure
C) elastic recoil and intrapulmonary pressure
D) perfusion pressure and elastic recoil
E) functional residual capacity and elastic recoil
Answer: A) quantity of air in the alveolus and volume of the alveoli
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