What is the main characteristic of trabecular bone?

• A. It makes up 80% of the body
• B. It has a high metabolic rate
• C. It's primarily found in the shafts of long bones
• D. It has a slow response to therapy

Answer: (B)

The main characteristic of trabecular bone is its high metabolic rate. Trabecular bone, also known as cancellous or spongy bone, is found primarily at the ends of long bones, in the pelvis, ribs, skull, and vertebrae. It plays a crucial role in the body’s metabolism, as it is more vascularized than cortical bone and is involved in processes such as the storage and release of minerals, particularly calcium.

Due to its high surface area and its location within the body, trabecular bone is more active in terms of remodeling compared to cortical bone. This remodeling process involves continuous turnover that allows for adaptation to stress and the maintenance of bone health. The rapid turnaround of trabecular bone is significant for individuals undergoing treatments that target bone density, as it can respond more quickly to therapeutic interventions.

This metabolic activity is essential, especially in the context of conditions like osteoporosis, where trabecular bone is often the first to show changes in density. Its high turnover rate makes it a key focus in therapies aimed at increasing bone density or overall bone health.