Which outcome occurs due to ruptured posterior air sacs during avian takeoff at high altitude?

💡 Explanation

When posterior air sacs rupture at altitude, reduced atmospheric pressure decreases inspired oxygen partial pressure because negative pressure ventilation is impaired, hindering effective oxygen diffusion. Therefore, lowered oxygen uptake results, rather than flapping imbalances, thermoregulation issues, or drag increases which stem from neuromuscular or aerodynamic dysfunctions.

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