Question

Follow the fate of carbon dioxide (CO2) through the process of ventilation and select the correct partial pressure of carbon dioxide at each of these locations in a healthy individual.

Note: you may not used all pressures and one pressure may be used more than once.

Question 3 options:

Venous blood Alveoli Arterial blood Tissues Air at sea level

1. 0.25 mm Hg 2. 40 mm Hg 3. ≥ 46 mm Hg 4. 100 mm Hg 5. 160 mm Hg 6. 760 mm Hg

Answer 1

Partial pressure of carbon di oxide

In Venous blood - >46 mmHg (40-50 mmHg)

In Alveoli - 40 mmHg

In arterial blood- 40 mmHg (35-40 mmHg)

In tissues- > 46mmHg

In air at sea level - 0.25 mmHg