In quiet breathing,
A) inspiration and expiration involve muscular contractions.
B) inspiration is passive and expiration involves muscular contractions.
C) inspiration involves muscular contractions and expiration is passive.
D) inspiration and expiration are both passive processes.
E) only the diaphragm is active during inhalation.
C) inspiration involves muscular contractions and expiration is passive.
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What is the average number of bones in the adult skeleton?
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