Question

The partial pressure of oxygen in the alveoli of the lungs is

Answer 1

Partial Pressure means the pressure exerted by an individual gas in a mixture of gases. For oxygen, it is represented by pO₂ and for Carbon Dioxide it is pCO₂.

pO₂ in alveoli of lungs is about 104 (mm Hg).

Answer 2

Answer:

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• PaCO2 is the carbon dioxide partial pressure in alveoli, which in normal physiological conditions is approximately 40 to 45 mm Hg, and the RQ (respiratory quotient). FiO2 is directly related to the percent composition of oxygen in the inspired air. Without support at sea level, this is 21% or 0.21.