1. pO ₂ = 104 and pCO ₂ = 40 2. pO ₂ = 40 and pCO ₂ = 45 3. pO ₂ = 95 and pCO ₂ = 40 4. pO ₂ = 159 and pCO ₂ = 0.3

Answer: 1. pO ₂ = 104 and pCO ₂ = 40 Standard values in the alveoli are pO ₂ = 104 mm Hg and pCO ₂ = 40 mm Hg. pO ₂ 40 and pCO ₂ 45 are deoxygenated blood/tissue values; 95 and 40 are oxygenated blood values; 159 and 0.3 are atmospheric air values.

Topic: Breathing and respiration: mechanism, exchange and transport of gases, volumes, disorders· Human Physiology

The partial pressures (in mm Hg) of oxygen (O_2) and carbon dioxide (CO_2) at alveoli (the site of diffusion) are :

1. pO\(_2\) = 104 and pCO\(_2\) = 40

2. pO\(_2\) = 40 and pCO\(_2\) = 45

3. pO\(_2\) = 95 and pCO\(_2\) = 40

4. pO\(_2\) = 159 and pCO\(_2\) = 0.3

Doubtly Asked 30 Oct 2026 NEET UG 2021 Practice test neet Save WhatsApp Report

1 answer

Best answer

Answer: 1. pO\(_2\) = 104 and pCO\(_2\) = 40

Standard values in the alveoli are pO\(_2\) = 104 mm Hg and pCO\(_2\) = 40 mm Hg.

pO\(_2\) 40 and pCO\(_2\) 45 are deoxygenated blood/tissue values; 95 and 40 are oxygenated blood values; 159 and 0.3 are atmospheric air values.

Doubtly AI · 30 Oct 2026 AI-generated · not yet verified Report

Was this answer helpful?

The partial pressures (in mm Hg) of oxygen (O_2) and carbon dioxide (CO_2) at alveoli (the site of diffusion) are :

1 answer

Your answer