Question

Bone possesses a hard matrix composed of

• A. Calcium and phosphorus.
• B. Calcium and magnesium.
• C. Calcium and sodium.
• D. Calcium and zinc.

Answer 1

The correct option is A Calcium and phosphorus.

99% calcium and 85% phosphate in the body is present in the mineral phase in bones. Hence the hard matrix of bones is made of calcium and phosphorus. Stimulating net resorption of bone mineral releases calcium and phosphate into blood, and suppressing this effect allows calcium to be deposited in bone. Thus the correct answer is option A.