Which of these statements does NOT describe PO₂ in the blood
A)It refers to the pressure exerted by the amount of oxygen in the atmosphere.
B)It is the most important factor determining the percent saturation of haemoglobin.
C)It is normal in carbon monoxide poisoning.
D)It is highest in the pulmonary vein.

Question

Quizplus · Accepted Answer

PO₂ refers to the partial pressure of oxygen in the blood, not the pressure exerted by the amount of oxygen in the atmosphere. This measurement is crucial for understanding how well oxygen is being transported in the blood. The other options (B, C, D) correctly describe aspects of PO₂ in the context of blood oxygen levels, haemoglobin saturation, carbon monoxide poisoning, and oxygen levels in different parts of the circulatory system.

Which of These Statements Does NOT Describe PO₂ in the Blood