Histology of Bone - BM5 NLM1

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1. What makes up Osteoid?

  • Mainly collagen type I embedded in a ground substance of proteoglycans, glycoproteins & water
  • Mainly fibrin embedded in a ground substance of proteoglycans, glycoproteins & water
  • Mainly collagen type II embedded in a ground substance of proteoglycans, glycoproteins & water
  • Mainly elastin embedded in a ground substance of proteoglycans, glycoproteins & water
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2. True or false: Cancellous/trabecular bone consists of lamellar bone & remodelled osteons arranged into bony plates that occupy the central cavity and bridge the cortical bone?

  • Pass
  • Howdy
  • True
  • False

3. Which of the following best describes mature/lamellar bone?

  • Strong, permanent bone with high mineral contents and organised lacing of collagen fibres. Forms the foetal skeleton.
  • Strong, permanent bone with high mineral contents and organised lacing of collagen fibres. Forms the adult skeleton.
  • Weak, temporary bone with low mineral contents and disorganised lacing of collagen fibres. Forms the adult skeleton.
  • Weak, temporary bone with low mineral contents and disorganised lacing of collagen fibres. Forms the foetal skeleton.

4. Where are Osteoprogenitor cells located?

  • Periosteum & Endosteum only
  • Periosteum only
  • Endosteum only
  • Periosteum, Endosteum & ECM

5. What is the main role of Osteocytes?

  • To form lacunae
  • To explode spontaneously
  • To maintain the bone ECM
  • To differentiate into Osteoblasts

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