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

With each breath, only about 10-15% of the air in the lungs is exchanged with fresh air. The lungs contain residual volume that never gets completely replaced. This is why breathing techniques work and why we can hold our breath - the lungs don't empty completely.

Keep practicing — related questions