Surfactant facilitates alveolar distention and ventilation by:
a. decreasing thoracic compliance.
b. attracting water to the alveolar surface.
c. decreasing surface tension in alveoli.
d. increasing diffusion in alveoli.
ANS: C
Surfactant decreases surface tension in alveoli, allowing the lungs to inflate. Surfactant does not decrease thoracic compliance, attract water, or increase diffusion.
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