The correct sequence of events during normal expiration is: I. Relaxation of diaphragm…

Biology · NEET · NTA ExamsBreathing and Exchange of Gases

The correct sequence of events during normal expiration is:

I. Relaxation of diaphragm and intercostal muscles.
II. Contraction of the diaphragm.
III. Increase in intra-pulmonary pressure above atmospheric pressure.
IV. Expulsion of air from the lungs.
V. Decrease in thoracic volume.

Choose the correct option from the following:

  1. I, V, III, IV
  2. II, V, III, IV
  3. I, III, V, IV
  4. II, I, V, IV

Answer

(A) I, V, III, IV

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