According to Wolff's Law, large bony projections occur where?

• A. Where heavy, active muscles attach
• B. At the center of the bone
• C. At the joints only
• D. In the medullary cavity

Answer: (A)

Wolff's Law states that bone adapts to the loads it experiences. When strong, active muscles pull on their attachment sites, the bone responds by strengthening those areas, forming larger bony projections to better resist the forces. That’s why large projections develop where heavy muscles attach—the attachment points bear the greatest mechanical stress and the bone remodels to withstand it. The center of the bone or the medullary cavity aren’t typically sites of outward growth to form big projections; joints influence articulation more than creating large muscle-attachment projections. Examples you can visualize are the deltoid tuberosity on the humerus and the greater trochanter on the femur, both growths at muscle attachment sites.