Which consequence results when premature surfactant depletion impacts alveoli?

💡 Explanation

Increased surface tension will collapse alveoli, because surfactant reduces alveolar surface tension via changing intermolecular forces, and therefore less gas exchange occurs, rather than enhancing diffusion; surfactant depletion doesn't directly impact osmotic or transport ability.

• Which adaptation enables avian soaring birds to sustain extended flight durations with lower wing-flapping frequency?
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