Which of the following is the correct sequence of events during inspiration in humans?
NEET UG 2023 · Human Physiology · easy
NEET 20234 options · 1 correct
Which of the following is the correct sequence of events during inspiration in humans?
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Answer: A
Diaphragm contracts, thoracic volume increases, intrapulmonary pressure falls
Why
Inspiration is an active process. The diaphragm contracts and flattens while the external intercostals lift the ribs, so thoracic volume increases. By Boyle’s law the intrapulmonary pressure drops below atmospheric pressure and air moves in.