Q:

Air in the pleural cavity (pneumothorax.)

safaTerkawi
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2022-08-08
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Air in the pleural cavity (pneumothorax).

  1. Allows intrapleural pressure to rise to atmospheric pressure.
  2. Causes the underlying lung to collapse by compressing it.
  3. Increases the functional residual capacity.
  4. Leads to a slight outward movement of the chest wall.
  5. Reduces vital capacity.
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safaTerkawi
2022-08-08
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A. True Air flows in since the pressure in the cavity is normally subatmospheric.

B. False Except in tension pneumothorax, pleural pressure does not exceed intrapulmonary pressure (atmospheric); collapse is due to elastic recoil of the lungs.

C. False It decreases as the lung collapses.

D. True The elastic recoil of the lung is no longer applied to the chest wall.

E. True The lungs cannot be fully inflated.

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