Which law states that bone adapts structurally to stresses placed upon it?

• A. Wolff's Law
• B. Hooke's Law
• C. Ohm's Law
• D. Newton's Law

Answer: (A)

Bone will adapt its structure to the mechanical loads it experiences. This principle is Wolff's Law: bone remodeling responds to the magnitude and direction of strain so that bone becomes stronger where it is stressed and can become weaker where loading is reduced. Mechanotransduction through osteocytes detects strain and signals osteoclasts and osteoblasts to resorb and form bone, realigning trabeculae and thickening cortical bone along the main stress paths. For example, weight-bearing activity increases bone density over time, while immobilization can cause bone loss. The other options describe different ideas: Hooke's Law is about elastic deformation under load, Ohm's Law concerns electrical circuits, and Newton's Laws describe motion and forces, not bone remodeling.