1. O2 CO2 Gas Exchange Diffusion
Ventilation allows the alveolar air to represent an “infinite” oxygen supply at a PO2 of 100 mmHg O2
Blood flow allows the alveolar capillaries to represent an “infinite” oxygen sink at PO2 of 40 mmHg
Ventilation allows the alveolar air to represent an “infinite” carbon dioxide sink at a PCO2 of 40 mmHg
CO2
Blood flow allows the alveolar capillaries to represent an “infinite” carbon dioxide supply at PCO2 of 45 mmHg
Fick’s first law
Flux = C (P1 - P2)
Where:
(P1 - P2) = pressure gradient
C = conductance