In the Human Gas Exchange System

Multiple Choice

In the human gas exchange system,

A) the lungs and airways are completely collapsed after a forceful exhalation.
B) the average P_O2 concentration of air inside the lungs is always lower than that in the air outside the lungs.
C) the P_O2 of the blood leaving the lungs is greater than that of the exhaled air.
D) the amount of air that is moved per breath during normal, at-rest breathing is termed the total lung capacity.
E) O₂ and CO₂ are actively transported across the alveolar and capillary membranes.