Which is the first event that takes place during the inspiration of air? The diaphragm descends and rib cage rises Transpulmonary pressure decreases Intrapulmonary pressure decreases Air flows into lungs
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This creates more space in the thoracic cavity, which allows the lungs to expand. Show more…
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For inspiration of air, which of the following happens first? A. Intrapulmonary pressure drops. B. Diaphragm descends, thoracic volume begins to increase, and rib cage rises. C. Air (gases) flows into the lungs. D. Thoracic cavity volume decreases.
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