What is a characteristic function of osteoclasts?

• A. Forming new bone material
• B. Maintaining existing bone
• C. Resorbing bone tissue
• D. Supporting bone structure

Answer: (C)

Osteoclasts are specialized cells responsible for bone resorption, which is the process of breaking down bone tissue. This action is critical for the regulation of calcium levels in the body and the overall remodeling of bone. Osteoclasts work by secreting enzymes and acids that dissolve the mineral components of the bone, allowing the release of calcium and other minerals back into the bloodstream. This function is essential for maintaining bone health, as it balances the activity of osteoblasts, which are responsible for bone formation.

While osteoblasts contribute to forming and maintaining bone, the primary role of osteoclasts is to resorb bone tissue. This process helps ensure that the skeletal system remains dynamic and able to adapt to the body's needs. An imbalance in osteoclast activity can lead to conditions such as osteoporosis, where excessive resorption results in weakened bones. Therefore, the characteristic function of osteoclasts is specifically related to their role in resorbing bone tissue.