Q. Regarding gas exchange in the lungs: (Solved)
1. N2O is diffusion limited
2. CO is perfusion limited
3. O2 is between N2O and CO but at rest, is perfusion limited
4. diffusing capacity of the lung for a gas is inversely proportionate to the surface area of the alveolocapillary membrane and directly proportional to its thickness
5. at rest, it takes blood 0.25secs to traverse the pulmonary capillaries
- c. O2 is between N2O and CO but at rest, is perfusion limited