Which cell type builds bone and remodels bone?

Which cell type builds bone and remodels bone?

• A. Osteoblasts
• B. Osteoclasts
• C. Cartilage
• D. Tendon

Answer: (A)

Osteoblasts are the cells that build bone and drive its remodeling. They synthesize and secrete osteoid, the organic matrix rich in collagen, and then promote mineralization with calcium phosphate to form hard bone. In the remodeling process, osteoclasts resorb old bone, and osteoblasts come in to lay down new bone, restoring structure and strength. While osteocytes help regulate remodeling in response to mechanical stress, and cartilage or tendon are not bone-forming cells, osteoblasts are the key players in both forming and renewing bone.

Osteoblasts are the cells that build bone and drive its remodeling. They synthesize and secrete osteoid, the organic matrix rich in collagen, and then promote mineralization with calcium phosphate to form hard bone. In the remodeling process, osteoclasts resorb old bone, and osteoblasts come in to lay down new bone, restoring structure and strength. While osteocytes help regulate remodeling in response to mechanical stress, and cartilage or tendon are not bone-forming cells, osteoblasts are the key players in both forming and renewing bone.