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NEET Biology question

BiologyBreathing and Exchange of GasesNEET

Arrange the given steps of expiration in the sequence of event occurring first I. Relaxation of the diaphragm and sternum II. Reduction of the pulmonary volume III. Expulsion of air from the lungs IV. Increase in intra pulmonary pressure

Answer: (B)

Solution

Expiration begins with relaxation of the diaphragm and sternum (I), which reduces the pulmonary volume (II), raising the intra-pulmonary

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Question ID VK-119126