If the Thoracic Wall Is Punctured, Air Leaking in Will

question 166

Multiple Choice

If the thoracic wall is punctured, air leaking in will cause the lung to collapse.Thus in the normal, intact thoracic cavity,

• A) lung expansion is passive.
• B) air pressure is the same as it is on the outside.
• C) a slight negative pressure in the pleural cavity keeps the alveoli partly inflated.
• D) inhalation decreases the volume of the thoracic cavity.
• E) increasing the volume of the thoracic cavity decreases the tension between the pleural membranes lining the thoracic cavity.

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