Multiple choice general knowledge science & technology

All the air in the lungs gets changed with each breath. True or False ?

  1. True

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

Not all air in the lungs is exchanged with each breath. Even after forceful exhalation, about 1 liter of air (residual volume) remains in the lungs to keep alveoli inflated for gas exchange.

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