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← Nature & AnimalsWhat outcome occurs when a bird experiences lung compression due to external pressure changes during rapid dives?
A)Air sac rupture reduces buoyancy✓
B)Reduced airflow enables efficient thermoregulation
C)Increased oxygen exchange maximizes ATP production
D)Unidirectional airflow minimizes dead space
💡 Explanation
Air sac rupture occurs because birds utilize air sacs connected to their lungs, and rapid external pressure change overwhelms the passive compliance of the air sacs. Therefore, air sacs burst reducing buoyancy, rather than maintaining respiratory efficiency, because overpressure causes mechanical failure disrupting normal function.
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