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).