When osteoblasts lay down bone and become trapped, what cell do they become that forms the communication network of the osteon?

When osteoblasts lay down bone and become trapped, what cell do they become that forms the communication network of the osteon?

• A. Osteocytes
• B. Osteoblasts
• C. Osteoclasts
• D. Osteoprogenitor cells

Answer: (A)

The main idea is that mature bone cells embedded in the mineralized matrix form the communication network within an osteon. When osteoblasts lay down bone, some get surrounded by the new matrix and mature into osteocytes. These cells sit in small pits called lacunae and extend long processes through canaliculi, connecting with other osteocytes and with surface-lining cells. Through these connections, they share nutrients and signals via gap junctions, coordinating mineral exchange and responses to mechanical load. This network of osteocytes is what maintains communication throughout the Haversian system and helps regulate remodeling. Osteoblasts are the bone-forming cells before they become trapped; osteoclasts resorb bone; osteoprogenitor cells are stem-like cells that can become osteoblasts. The role described—forming a connected, embedded communication network—fits osteocytes best.

The main idea is that mature bone cells embedded in the mineralized matrix form the communication network within an osteon. When osteoblasts lay down bone, some get surrounded by the new matrix and mature into osteocytes. These cells sit in small pits called lacunae and extend long processes through canaliculi, connecting with other osteocytes and with surface-lining cells. Through these connections, they share nutrients and signals via gap junctions, coordinating mineral exchange and responses to mechanical load. This network of osteocytes is what maintains communication throughout the Haversian system and helps regulate remodeling.

Osteoblasts are the bone-forming cells before they become trapped; osteoclasts resorb bone; osteoprogenitor cells are stem-like cells that can become osteoblasts. The role described—forming a connected, embedded communication network—fits osteocytes best.