Question #6428131Single Choice
Biology
Question
During exhalation, which of the following occurs?
Options
A
The diaphragm contracts and moves downward to force air out of the lungs.
B
The diaphragm relaxes and moves upward, reducing the volume of the chest cavity.
C
The intercostal muscles contract to increase lung volume, pushing air out.
D
The air pressure inside the lungs becomes lower than outside, causing air to flow in.
Answer & Analysis
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