Which process prevents respiratory failure when mallard ducks experience high wing loading during takeoff?

💡 Explanation

When wing loading is high during takeoff, strenuous muscle activity raises oxygen demand; enhanced air sac ventilation occurs because air sacs allow unidirectional airflow through the lungs, maximizing gas exchange efficiency. Therefore enhanced ventilation maintains oxygen supply, rather than tidal shifts, recoil alteration or metabolic change, which cannot meet acute needs.

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