Which of the following best describes bone resorption?

• A. Building new bone
• B. Breaking down bone
• C. Maintaining bone density
• D. Strengthening bone structure

Answer: (B)

Bone resorption is best described as the process of breaking down bone. This physiological process involves the removal of minerals and collagen from bone tissue, which is primarily facilitated by specialized cells known as osteoclasts. During bone resorption, minerals such as calcium and phosphorus are released into the bloodstream, contributing to the regulation of bone density and homeostasis of calcium levels in the body.

This process is crucial as it balances bone formation, which is carried out by osteoblasts—the cells responsible for building new bone. Efficient bone remodeling, which includes both resorption and formation, is essential for maintaining healthy bone density and strength throughout a person’s life.

While maintaining bone density and strengthening bone structure are important aspects of bone health, they do not directly define the process of resorption. Therefore, the description of breaking down bone accurately captures the nature of bone resorption.