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

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

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

Answer: (A)

Osteocytes are the cells that maintain the bone matrix. They are mature osteoblasts that become embedded in the mineralized matrix and reside in spaces called lacunae, connected by tiny channels called canaliculi. This network lets them sense mechanical strain and coordinate remodeling by signaling to osteoblasts and osteoclasts. Through their signaling, they regulate mineralization and the balance of calcium and phosphate, helping to preserve and adjust the matrix as needed. Osteoblasts build the matrix and later become osteocytes, while osteoclasts resorb old matrix. Chondrocytes produce cartilage, not bone, so they aren’t responsible for maintaining the bone matrix.

Osteocytes are the cells that maintain the bone matrix. They are mature osteoblasts that become embedded in the mineralized matrix and reside in spaces called lacunae, connected by tiny channels called canaliculi. This network lets them sense mechanical strain and coordinate remodeling by signaling to osteoblasts and osteoclasts. Through their signaling, they regulate mineralization and the balance of calcium and phosphate, helping to preserve and adjust the matrix as needed.

Osteoblasts build the matrix and later become osteocytes, while osteoclasts resorb old matrix. Chondrocytes produce cartilage, not bone, so they aren’t responsible for maintaining the bone matrix.