Which mineral pairing is typically assessed to evaluate bone metabolism disorders?

Which mineral pairing is typically assessed to evaluate bone metabolism disorders?

• A. Sodium and potassium
• B. Magnesium and zinc
• C. Calcium and phosphorus
• D. Chloride and bicarbonate

Answer: (C)

Calcium and phosphorus are the minerals most closely tied to bone metabolism. Bone is made of a mineral matrix of calcium phosphate (hydroxyapatite), so the balance and levels of these two minerals reflect how actively bone is being formed or resorbed. Hormones like parathyroid hormone and vitamin D regulate their levels, and kidney function also influences phosphorus handling; measuring calcium and phosphorus together provides insight into disorders that affect bone turnover, such as osteoporosis, osteomalacia, or CKD-related bone disease. Other mineral pairs listed play important roles in general physiology, but they are not the primary indicators used to assess bone metabolism status.

Calcium and phosphorus are the minerals most closely tied to bone metabolism. Bone is made of a mineral matrix of calcium phosphate (hydroxyapatite), so the balance and levels of these two minerals reflect how actively bone is being formed or resorbed. Hormones like parathyroid hormone and vitamin D regulate their levels, and kidney function also influences phosphorus handling; measuring calcium and phosphorus together provides insight into disorders that affect bone turnover, such as osteoporosis, osteomalacia, or CKD-related bone disease. Other mineral pairs listed play important roles in general physiology, but they are not the primary indicators used to assess bone metabolism status.