Which cell resorbs bone during remodeling?

Which cell resorbs bone during remodeling?

• A. Osteoblasts
• B. Osteocytes
• C. Osteoclasts
• D. Chondrocytes

Answer: (C)

During bone remodeling, the resorption phase is carried out by osteoclasts. These large, multinucleated cells attach to the bone surface and create a sealed zone where they secrete acids and proteolytic enzymes to dissolve mineral and organic matrix. This forms resorption pits (Howship’s lacunae) and clears old or damaged bone so new bone can be laid down by osteoblasts. Osteocytes are mature bone cells embedded in the matrix and help regulate remodeling signals, but they don’t resorb bone. Chondrocytes are cartilage cells and aren’t involved in bone resorption. So the cell that resorbs bone during remodeling is osteoclasts.

During bone remodeling, the resorption phase is carried out by osteoclasts. These large, multinucleated cells attach to the bone surface and create a sealed zone where they secrete acids and proteolytic enzymes to dissolve mineral and organic matrix. This forms resorption pits (Howship’s lacunae) and clears old or damaged bone so new bone can be laid down by osteoblasts. Osteocytes are mature bone cells embedded in the matrix and help regulate remodeling signals, but they don’t resorb bone. Chondrocytes are cartilage cells and aren’t involved in bone resorption. So the cell that resorbs bone during remodeling is osteoclasts.