Multiple choice

The partial pressure of carbon dioxide will be the highest in

  1. inhaled gas

  2. exhaled gas

  3. systemic venous blood

  4. systemic arterial blood

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Systemic venous blood is the blood which has given up its oxygen to the tissues and is carrying carbon dioxide back through the systemic veins for gaseous exchange in the lungs. So, the partial pressure of carbon dioxide will be the highest in systemic venous blood.