Which substance is neither one of the two principal mineral nutrients in bone hydroxyapatite nor the vitamin that helps the body absorb calcium?
Question and options
Which substance is neither one of the two principal mineral nutrients in bone hydroxyapatite nor the vitamin that helps the body absorb calcium?
Calcium
Phosphorus
Vitamin D
Sodium
Answer and explanation
Correct answer: D - Sodium
Calcium and phosphate are the principal mineral components of bone hydroxyapatite. Vitamin D helps the body absorb calcium. Sodium is outside those three roles, although sodium can occur in bone mineral.
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