Which of the following statements is not true?

Question

Which of the following statements is not true? (A) The partial pressure of oxygen in oxygenated blood is 95 mm Hg (B) The partial pressure of oxygen in the alveolar air is 104 mm Hg (C) The partial pressure of carbon dioxide in the alveolar air is 40 mm Hg (D) The partial pressure of carbon dioxide in deoxygenated blood is 95 mm Hg

Tardigrade Admin · Accepted Answer

Each gas in the mixture exerts a part of the total pressure proportional to its concentration, ie, the partial pressure. This is denoted as “p”,e.g., pO₂, pCO₂.
Partial pressure (mm Hg) of respiratory gases

Tissues

O₂	159	104	40	95	40
CO₂	0.3	40	45	40	45

Q. Which of the following statements is not true?

The partial pressure of oxygen in oxygenated blood is 95 mm Hg

The partial pressure of oxygen in the alveolar air is 104 mm Hg

The partial pressure of carbon dioxide in the alveolar air is 40 mm Hg

The partial pressure of carbon dioxide in deoxygenated blood is 95 mm Hg

Each gas in the mixture exerts a part of the total pressure proportional to its concentration, ie, the partial pressure. This is denoted as “p”,e.g., pO2, pCO2. Partial pressure (mm Hg) of respiratory gases Tissues O2 159 104 40 95 40 CO2 0.3 40 45 40 45

Each gas in the mixture exerts a part of the total pressure proportional to its concentration, ie, the partial pressure. This is denoted as “p”,e.g., pO₂, pCO₂.
Partial pressure (mm Hg) of respiratory gases

Tissues

O₂ 159 104 40 95 40

CO₂ 0.3 40 45 40 45