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Questions and Answers
What is the normal pleural pressure when respiratory muscles are completely relaxed and airways are open?
What is the normal pleural pressure when respiratory muscles are completely relaxed and airways are open?
- 0 mm Hg
- -2.5 mm Hg (correct)
- -10 mm Hg
- -6 mm Hg
What happens to the pleural pressure during inspiration due to chest wall expansion?
What happens to the pleural pressure during inspiration due to chest wall expansion?
- Becomes more negative (correct)
- Remains at -2.5 mm Hg
- Becomes more positive
- Balances out
What is the clinical significance of intrapleural pressure becoming equal to atmospheric pressure?
What is the clinical significance of intrapleural pressure becoming equal to atmospheric pressure?
- Chest wall expands
- Pneumothorax occurs (correct)
- Breathing becomes easier
- Lungs expand
What is transpulmonary pressure defined as?
What is transpulmonary pressure defined as?
During expiration, what causes the decrease in alveolar pressure?
During expiration, what causes the decrease in alveolar pressure?
What results from the elastic recoil of the lungs compressing the air in the alveoli?
What results from the elastic recoil of the lungs compressing the air in the alveoli?
What is the main muscle responsible for inspiration?
What is the main muscle responsible for inspiration?
During inspiration, what happens to the intrapleural pressure?
During inspiration, what happens to the intrapleural pressure?
Which muscle is involved in increasing the lateral and anterio-posterior diameters of the thoracic cage during inspiration?
Which muscle is involved in increasing the lateral and anterio-posterior diameters of the thoracic cage during inspiration?
What defines transpulmonary pressure?
What defines transpulmonary pressure?
Which factor plays a significant role in changing the compliance of the lungs?
Which factor plays a significant role in changing the compliance of the lungs?
In which phase of respiration would one typically observe a decrease in pleural pressure?
In which phase of respiration would one typically observe a decrease in pleural pressure?
What is the role of the abdominal muscles in expiration?
What is the role of the abdominal muscles in expiration?
How does intrapleural pressure relate to pleural pressure?
How does intrapleural pressure relate to pleural pressure?
What causes intrapulmonary pressure to decrease during inspiration in quiet breathing?
What causes intrapulmonary pressure to decrease during inspiration in quiet breathing?
How does intrapulmonary pressure change during expiration in quiet breathing?
How does intrapulmonary pressure change during expiration in quiet breathing?
What is transpulmonary pressure?
What is transpulmonary pressure?
In quiet breathing, what is the significance of intrapulmonary pressure reaching 0 mm Hg at end-inspiration?
In quiet breathing, what is the significance of intrapulmonary pressure reaching 0 mm Hg at end-inspiration?
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