Which describes the quantity or mass of bone, measured in grams?

• A. Bone mineral content (BMC)
• B. Bone mineral density (BMD)
• C. Bone densitometry
• D. Osteoblasts

Answer: (A)

The main idea is identifying what is being measured as a total mineral mass versus a density or a technique. Bone mineral content is the total amount of mineral in bone, quantified in grams, so it directly reflects the mass of mineral present. Bone mineral density, on the other hand, expresses how much mineral exists per unit area or volume, which is a density measurement, not the total mass. Bone densitometry is the imaging method used to assess density, not a specific quantity. Osteoblasts are the cells that form bone, not a measurement. Therefore, the quantity or mass of bone measured in grams corresponds to bone mineral content.