The Intrapleural Pressure Is Always Less Than the Alveolar Pressure

Multiple Choice

The intrapleural pressure is always less than the alveolar pressure because

A) Airway resistance slows down air movem ent into and out of the lungs
B) The chest wall always tends to expand at all lung volumes
C) The lungs tend to pull away from the chest wall at all lung volumes
D) The respiratory muscles tug on the chest at all times
E) Otherwise we wouldn’t have these cool sucking gun shot wounds in the movies where only the bad guys die instantly and the heros get to say goodbye