In contrast to inhalation, exhalation:
A. requires muscular effort to effectively expel air from the lungs.
B. is a passive process caused by increased intrathoracic pressure.
C. occurs when the diaphragm lowers and expels air from the lungs.
D. is an active process caused by decreased intrathoracic pressure.
Answer: B. is a passive process caused by increased intrathoracic pressure.
Health Professions
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