Physiology – MCQ 60 – Arterial oxygen tension
In which of the following a reduction in arterial oxygen tension occurs?
A. Anaemia
B. CO poisoning
C. Moderate exercise
D. Hypoventilation
Correct answer : D. Hypoventilation
Reduction in arterial oxygen tension occurs in respiratory failure – Type 1 (decreased oxygenation) or Type 2 (defective ventillation).