Question

Match List-I with List-II (Types of cells in bone tissue with their description) 
 \[ \begin{array}{|l|l|} \hline \textbf{LIST I} & \textbf{LIST II} \\ \hline A. \ \text{Osteoclasts} & I. \ \text{Mature bone cells} \\ B. \ \text{Osteoblasts} & II. \ \text{Huge cells derived from fusion of monocytes} \\ C. \ \text{Osteocytes} & III. \ \text{Unspecialized bone stem cells from mesenchyme} \\ D. \ \text{Osteoprogenitor cells} & IV. \ \text{Bone building cells} \\ \hline \end{array} \]

• A. (A)-(II), (B)-(IV), (C)-(I), (D)-(III)
• B. (A)-(III), (B)-(I), (C)-(IV), (D)-(II)
• C. (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
• D. (A)-(IV), (B)-(III), (C)-(II), (D)-(I)
• E.

Hint:

Osteoclasts = Bone resorption, Osteoblasts = Bone building, Osteocytes = Mature cells, Osteoprogenitors = Stem cells.

Answer 1

The Correct Option is A

Step 1: Osteoclast Function. Osteoclasts, large multinucleated cells from monocytes, are responsible for bone resorption (breaking down old bone tissue). They correspond to (II).

Step 2: Osteoblast Function. Osteoblasts are bone-forming cells that secrete osteoid (bone matrix). This matrix later mineralizes to form hard bone. They correspond to (IV).

Step 3: Osteocyte Function. Osteocytes, mature bone cells originating from osteoblasts embedded in the bone matrix, maintain bone tissue and communicate through canaliculi. They correspond to (I).

Step 4: Osteoprogenitor Cell Function. Osteoprogenitor cells are undifferentiated stem cells from mesenchyme that differentiate into osteoblasts when required. They correspond to (III).

Step 5: Final Matching. The correct pairings are: (A)-(II), (B)-(IV), (C)-(I), (D)-(III).