Multiple choice general knowledge science & technology

The lungs _______ when the diaphragm rises

  1. Contract

  2. Expand

  3. Inflate

  4. Relax
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

When the diaphragm rises (during exhalation), it creates pressure in the chest cavity that causes the lungs to contract and push air out. The diaphragm is a dome-shaped muscle - when it contracts and flattens, lungs expand; when it rises and relaxes, lungs contract. This is the opposite of what many students intuitively expect.

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