chapter 9 Life Processes in Animals - Part 3

What happens to the diaphragm during exhalation?

Type: MCQ • Marks: 1
What happens to the diaphragm during exhalation?
Options
A. It relaxes and moves upward
B. It contracts downward
C. It becomes rigid permanently
D. It moves into lung
Explanation
Relaxation reduces chest volume and helps push air out.
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