Bone modeling involves which process?

Bone modeling involves which process?

• A. Force is pushed on bone(s) and it causes them to bend, and then osteoblasts build new bone where the bones bend
• B. Bone remodeling occurs exclusively by osteoclasts
• C. Bone length increases via cartilage growth at joints
• D. Bone density decreases with loading

Answer: (A)

Bone modeling is the process by which bones change their shape or size in response to mechanical forces. When a load causes a bone to bend, the strain stimulates osteoblasts to lay down new bone at the sites experiencing that bending, thickening and strengthening the bone where it needs to resist future loads. This is different from remodeling, where resorption and formation happen on the same surface to replace microdamage. Bone lengthening comes from cartilage growth at the growth plates, not modeling, and loading generally increases bone density rather than decreasing it.

Bone modeling is the process by which bones change their shape or size in response to mechanical forces. When a load causes a bone to bend, the strain stimulates osteoblasts to lay down new bone at the sites experiencing that bending, thickening and strengthening the bone where it needs to resist future loads. This is different from remodeling, where resorption and formation happen on the same surface to replace microdamage. Bone lengthening comes from cartilage growth at the growth plates, not modeling, and loading generally increases bone density rather than decreasing it.