Question

Bone matrix is rich in______________.

• A. Fluoride and calcium
• B. Calcium and phosphorus
• C. Calcium and potassium
• D. Phosphorus and potassium

Answer 1

The correct option is B Calcium and phosphorus

Bone is not a uniformly solid material, but is mostly a matrix. The primary tissue of bone, osseous tissue, is relatively hard and lightweight. Its matrix is mostly made up of a composite material incorporating the inorganic mineral calcium phosphate and organic collagen, an elastic protein, which improves fracture resistance. Bone is formed by the hardening of this matrix around entrapped cells.

Hence the correct option is B.