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

Biology
WAEC 2017

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 Answer: Option B
Explanation

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

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