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← Nature & AnimalsWhich outcome occurs when significant feather barbule damage disrupts avian flight surfaces?
A)Reduced laminar airflow and lift✓
B)Increased metabolism from thermoregulation
C)Elevated heart rate from muscle exertion
D)Decreased bone density from altered stress
💡 Explanation
When feather barbules suffer damage, disruption of adhesion occurs because microscopic hooks on the barbules disassemble, creating gaps in the surface that compromise airflow. This leads to reduced lift. Therefore reduced laminar airflow and lift results, rather than changes in metabolism, heart rate, or bone density, which arise from distinct stresses.
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