Which membrane lines the inner surface of bone where resorption occurs?

Which membrane lines the inner surface of bone where resorption occurs?

• A. Epiphysis
• B. Endosteum
• C. Periosteum
• D. Articular cartilage

Answer: (B)

The inner surface of bone where remodeling and resorption occur is lined by the endosteum. This thin membrane covers the medullary cavity and the internal surfaces of cortical bone and trabeculae. It houses osteogenic cells that can become osteoblasts or osteoclasts, enabling bone resorption and subsequent formation during remodeling. The periosteum, in contrast, coats the outer surface and supplies cells for growth and repair outward from the bone; articular cartilage lines joint surfaces rather than bone interiors; epiphysis refers to the end part of a long bone, not a lining membrane. So the endosteum is the correct membrane for the inner bone surface involved in resorption.

The inner surface of bone where remodeling and resorption occur is lined by the endosteum. This thin membrane covers the medullary cavity and the internal surfaces of cortical bone and trabeculae. It houses osteogenic cells that can become osteoblasts or osteoclasts, enabling bone resorption and subsequent formation during remodeling. The periosteum, in contrast, coats the outer surface and supplies cells for growth and repair outward from the bone; articular cartilage lines joint surfaces rather than bone interiors; epiphysis refers to the end part of a long bone, not a lining membrane. So the endosteum is the correct membrane for the inner bone surface involved in resorption.