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Acadia Bio 20 Review Flashcards | StudBud
Acadia Bio 20 Review
1 / 71
Which of the following occurs during expiration?
A
The ribcage expands and the lungs fill with air
B
The diaphragm relaxes and moves upward
C
Oxygen is actively pumped into the lungs
D
The diaphragm contracts and moves downward
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