MEDICAL
LUNGS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Inspiration
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Expiration
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Either A or B
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None of the above
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Detailed explanation-1: -During inspiration, the diaphragm and external intercostal muscles contract, causing the rib cage to expand and move outward, and expanding the thoracic cavity and lung volume. This creates a lower pressure within the lung than that of the atmosphere, causing air to be drawn into the lungs.
Detailed explanation-2: -When the diaphragm contracts, air is pulled into your airway through your nose or mouth. Air then travels down your airway, or trachea, dividing into your right or left lung via the bronchi. The bronchi then separate into small tubes called bronchioles.
Detailed explanation-3: -Intra-pleural pressure is sub-atmospheric. This is due to the recoil of the chest and lungs away from each other. Müller’s maneuver can temporarily but significantly decrease the intrapleural pressure.