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BIO NMDCAT Human skeleton
nmdcat.online July 27, 2026

Compared with cartilage, bone is more rigid mainly because its matrix contains a higher amount of:

A. Collagen fibers only
B. Mineral salts, especially calcium phosphate
✓
C. Elastic fibers
D. Chondrin only

📝 Explanation

Correct: Bone hardness results from deposition of calcium phosphate and other mineral salts. A: Collagen provides tensile strength but not hardness alone. C: Elastic fibers increase flexibility. D: Chondrin is characteristic of cartilage. Concept: Composition of bone matrix.

📖 Additional Information

  • Collagen fibers only
  • Mineral salts, especially calcium phosphate
  • Elastic fibers
  • Chondrin only

Correct: Bone hardness results from deposition of calcium phosphate and other mineral salts. A: Collagen provides tensile strength but not hardness alone. C: Elastic fibers increase flexibility. D: Chondrin is characteristic of cartilage. Concept: Composition of bone matrix.

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