During inspiration, the diaphragm ___ causing a(n) ___ in thoracic volume and a(n) ___ in the alveolar pressure.
A. Relaxes; increase; decrease
B. Contracts; increase; decrease
C. Relaxes; decrease; increase
D. Contracts; decrease; increase
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During expiration, the diaphragm ___ causing a(n) ___ in thoracic volume and a(n) ___ in the alveolar pressure.
A. Relaxes; decrease, increase
B. Relaxes; increase, decrease
C. Contracts; decrease; increase
D. Contracts; increase; decrease
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