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Practice MCAT Question - Q125

Surfactant is a secretion in the lungs that prevents alveoli from collapsing. Without this substance, what problem(s) might occur?

A.  The diameter of the bronchioles would remain constant.
B.  Inhalation would have to be more forceful.
C.  Exhalation would have to be more forceful.
D.  All of the above

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