If the Thoracic Wall Is Punctured, Air Leaking in Will

question 78

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 suction keeps lungs inflated.
• D) breathing movements keep lungs inflated.
• E) Both a and b

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