Spongy Bone · Histology

Which structural component forms the mineralized framework of spongy bone?

  1. Collagen fibers and hydroxyapatite
  2. Elastin fibers and calcium carbonate
  3. Keratin fibers and calcium sulfate
  4. Reticular fibers and calcium carbonate
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Correct answer: Collagen fibers and hydroxyapatite

The bone matrix contains collagen fibers and hydroxyapatite crystals. This combination provides both flexibility and strength.

Difficulty: Medium Question 18 of 20

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