22. Respiratory System
Pulmonary Ventilation
Multiple Choice
Multiple ChoiceDuring inspiration, air moves into the lungs because __________.
A
abdominal muscles contract
B
contraction of the diaphragm decreases the volume of the pleural cavity
C
contraction of the internal intercostal muscles decreases the thoracic cavity volume
D
the volume of the lungs decreases with inspiration
E
the gas pressure in the lungs becomes lower than the outside pressure as the diaphragm contracts
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