10. The Respiratory System

Gas A and Gas B are both mixtures separated by a permeable membrane. Gas A contains 40% nitrogen at a partial pressure of 300 mmHg. Gas B contains 80% nitrogen at partial pressure of 200 mmHg. Given this information, in which direction do you expect to see a net movement of nitrogen and why?

Air in the alveoli is approximately 5.2% CO₂. Given that information along with the total air pressure in the alveoli, which law would allow you to calculate the partial pressure of CO₂?

How is Henry’s law related to the amount of gas that can be exchanged in the alveoli?

Gas A is 40% oxygen and 10% CO₂. It has a total pressure of 500 mm Hg. Gas A is in contact with a with a liquid containing oxygen at a partial pressure of 100 mmHg and CO₂ at a partial pressure of 25 mm Hg. In which direction will O₂ and CO₂ diffuse in this situation?