Multiple choice general knowledge

> All the air in the lungs gets changed with each breath

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The lungs never completely empty. Even after maximum exhalation, about 1 liter of residual air remains (residual volume). Each breath only exchanges a portion of the lung's air capacity, which is why we need multiple breaths to affect air quality changes. The answer is correctly False.

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