NEET PG DENTAL EXAM

HISTOLOGY

CARTILAGE BONE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Once the calcified matrix surrounds an osteoblast this cell becomes a
A
Osteoclast
B
Osteoblast
C
Osteocyte
D
Osteomite
Explanation: 

Detailed explanation-1: -As the secreted matrix surrounding the osteoblast calcifies, the osteoblast becomes trapped within it. As a result, it changes in structure, becoming an osteocyte, the primary cell of mature bone and the most common type of bone cell. Each osteocyte is located in a space (lacuna) surrounded by bone tissue.

Detailed explanation-2: -Osteoblast to Osteocyte Transition At the end of the bone formation phase, osteoblasts can either become embedded in bone as osteocytes, become inactive osteoblasts or bone lining cells3 or undergo programmed cell death (apoptosis)3, 4.

Detailed explanation-3: -Occasionally, though, osteoblasts become trapped in the calcified matrix and become osteocytes-bone cells. As calcification proceeds, bony spicules radiate out from the region where ossification began (Figure 14.11B).

Detailed explanation-4: -osteocyte, a cell that lies within the substance of fully formed bone. It occupies a small chamber called a lacuna, which is contained in the calcified matrix of bone. Osteocytes derive from osteoblasts, or bone-forming cells, and are essentially osteoblasts surrounded by the products they secreted.

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