What changes in arterial blood gases would be expected to occur exercise levels of 40% of maximum oxygen consumption?
I.PaO₂ would decrease
II.PaCO₂ would decrease
III.pH would remain unchanged
A) III only
B) I, II, and III
C) I only
D) II only

Question

Quizplus · Accepted Answer

During moderate exercise, such as at 40% of maximum oxygen consumption, the body increases ventilation to match the increased demand for oxygen and the need to expel carbon dioxide. This results in efficient gas exchange, keeping arterial oxygen (PaO₂) and carbon dioxide (PaCO₂) levels relatively stable, and thus, the pH remains largely unchanged.

What Changes in Arterial Blood Gases Would Be Expected to Occur