1. Tardigrade
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  3. Biology
  4. Mark the true statement among the following with reference to normal breathing.

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Q. Mark the true statement among the following with reference to normal breathing.

Breathing and Exchange of Gases

Solution:

Inspiration is the process by which fresh atmospheric air enters into the alveoli of the lungs. It is an active process and is brought about by activity of inspiratory muscles. Expiration is the process by which foul air is expelled out of the lungs. Expiration is a normal passive process that involves relaxation of inspiratory muscles.