Which hormone influences both resorption and deposition of bone?

Which hormone influences both resorption and deposition of bone?

• A. Calcitonin
• B. Growth Hormone
• C. Calcitriol
• D. Thyroid Hormone

Answer: (C)

Calcitriol, the active form of vitamin D, plays a crucial role in regulating calcium and phosphate levels in the body, which are essential for bone health. The hormone facilitates the resorption of bone by promoting the activity of osteoclasts, the cells responsible for breaking down bone tissue, thereby aiding in the release of calcium and phosphate into the bloodstream. Simultaneously, calcitriol also encourages the deposition of bone by enhancing calcium absorption in the intestines and maintaining adequate phosphate levels, necessary for the formation and mineralization of bone tissue. This dual influence makes calcitriol a key player in maintaining the balance between bone resorption and deposition, supporting overall skeletal health and homeostasis.