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← Nature & AnimalsWhich process prevents respiratory failure when mallard ducks experience high wing loading during takeoff?
A)Increased tidal volume via diaphragm
B)Elastic recoil lung structure change
C)Enhanced air sac system ventilation✓
D)Decreased metabolic rate via hormone
💡 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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