The partial pressures (in mmHg ) of oxygen O 2 and carbon dioxide CO 2 at alveoli (the site of diffusion) are:

The partial pressures (in mmHg) of oxygen O2 and carbon dioxide CO2 at alveoli (the site of diffusion) are:
  1. pO2=104 and pCO2=40
  2. pO2=40 and pCO2=45
  3. pO2=95 and pCO2=40
  4. pO2=159 and pCO2=0.3

Solution

Partial pressures (in mmHg) of O2 and CO2 at different sites of the body and in the atmosphere:

Respiratory Gases Atmospheric pressure Alveoli Oxygenated Blood Deoxygenated Blood Tissues
O2 159 104 95 40 40
CO2 0.3 40 40 45 45

Asked in: NEET 2021

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