Which cell type is primarily responsible for producing the bone matrix?

Which cell type is primarily responsible for producing the bone matrix?

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

Answer: (B)

Osteoblasts are the cells that lay down bone matrix. They line bone surfaces and synthesize the organic component of the matrix (osteoid), mainly type I collagen and various non-collagenous proteins. This osteoid is then mineralized with calcium phosphate to form hard bone. Osteoblasts also produce alkaline phosphatase, which helps drive mineralization. When an osteoblast becomes embedded in its own matrix, it becomes an osteocyte, which helps maintain and regulate the bone. In contrast, osteoclasts resorb bone and fibroblasts produce connective tissue, not bone matrix.

Osteoblasts are the cells that lay down bone matrix. They line bone surfaces and synthesize the organic component of the matrix (osteoid), mainly type I collagen and various non-collagenous proteins. This osteoid is then mineralized with calcium phosphate to form hard bone. Osteoblasts also produce alkaline phosphatase, which helps drive mineralization. When an osteoblast becomes embedded in its own matrix, it becomes an osteocyte, which helps maintain and regulate the bone. In contrast, osteoclasts resorb bone and fibroblasts produce connective tissue, not bone matrix.