Oxygen and carbon dioxide are exchanged in the lungs and through all cell membranes bya. active transport,b. diffusion,c. filtration,d. osmosis.

What is the significance of (b) Dalton's law, to the process of respiration?

Which of the following does not occur in internal respiration? (a) Oxygen diffuses from the blood to the interstitial spaces. (b) Carbon dioxide diffuses from the interstitial spaces to the blood. (c) Hemoglobin binds more oxygen. (d) Bicarbonate ions are formed in red blood cells. (e) Chloride ions diffuse into red blood cells as bicarbonate ions diffuse out.

Gas exchange at the blood air barrier is efficient because (a) the differences in partial pressure are substantial, (b) the gases are lipid soluble, (c) the total surface area is large, (d) of all of these.

Doris has an obstruction of her right primary bronchus. As a result, how would the oxygen–hemoglobin saturation curve for her right lung compare with that for her left?

Clearly explain the difference between external and internal respiration.

What is it about the structure of the alveoli that makes them an ideal site for gas exchange?