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Which of the following actions does not occur d... - WAEC Biology 2017 Question

Which of the following actions does not occur during exhalation in man?

A
Thoracic cavity decreases in volume
B
Diaphragm flattens
C
Ribs move down and in
D
Air pressure increases in the thoracic cavity
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Correct Option: B

When you breathe in, or inhale, your diaphragm tightens and moves downward (flattens).

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