The amount of carbon dioxide that can diffuse through the diffusion membrane is much higher compared to that of oxygen because:

1.	the gradient across the membrane is much higher for carbon dioxide
2.	carbon dioxide is more toxic than oxygen
3.	solubility of carbon dioxide is much higher than that of oxygen
4.	carbon dioxide has more affinity for hemoglobin than that of oxygen

What amount of carbon dioxide is delivered by every 100 ml of deoxygenated blood at the alveoli under normal physiological conditions?

The oxy-hemoglobin dissociation curve shifts to the right in all the following conditions except:

The binding of carbon dioxide to hemoglobin:
I: is related to the partial pressure of carbon dioxide
II: is affected by the partial pressure of oxygen
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect

The alveoli are lined with:
1. Simple cuboidal epithelium
2. Pseudo-stratified columnar ciliated epithelium
3. Transitional epithelium
4. Simple squamous epithelium

The volume of thoracic chamber in the antero-posterior axis can be increased by:
1. Contraction of diaphragm
2. Relaxation of diaphragm
3. Contraction of external intercostals
4. Contraction of internal intercostals

The partial pressure of oxygen in oxygenated blood is about:

Which of the following equations regarding the calculation of pulmonary capacities would be correct?

The formation of oxy-hemoglobin at the alveoli is favored by all the following except:

The major mode of transport of carbon dioxide in human body is: