Exchange of Gases — Prelims Questions

Which of the following factors would decrease the rate of oxygen diffusion from the alveoli into the blood?

What are the approximate partial pressures of O\textsubscript{2} and CO\textsubscript{2} in deoxygenated blood entering the pulmonary capillaries?

Which statement accurately describes the diffusion of gases at the tissue level?

Compared to oxygen, carbon dioxide diffuses across the respiratory membrane much faster primarily because:

A patient suffering from emphysema experiences difficulty in gas exchange. Which of the following changes in the respiratory membrane is most likely responsible for this difficulty?

What is the approximate partial pressure of oxygen (PO\textsubscript{2}) in atmospheric air at sea level, assuming a total atmospheric pressure of 760 mmHg?