Bone Plasticity and Homeostasis Quiz
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Questions and Answers

How does the constant formation and destruction of bones contribute to bone plasticity?

  • By mobilizing calcium from the bone matrix
  • By promoting iron and magnesium absorption
  • By enhancing bone flexibility (correct)
  • By increasing the number of osteoclasts
  • What role do osteoclasts play in bone homeostasis?

  • They break down and resorb bone tissue (correct)
  • They maintain bone density
  • They promote iron and magnesium absorption
  • They continuously form new bone tissue
  • What materials are mobilized from the bone matrix during bone homeostasis?

  • Iron and magnesium
  • Collagen fibers
  • Growth factors
  • Calcium, phosphate, and other minerals (correct)
  • What is the significance of bone constantly being formed and destroyed in bone homeostasis?

    <p>It allows bone to adapt to changing mechanical demands (A)</p> Signup and view all the answers

    One consequence of an imbalance in osteoblastic and osteoclastic activity is:

    <p>Decreased bone flexibility (D)</p> Signup and view all the answers

    What are the two main factors the body requires to maintain bone homeostasis?

    <p>Calcium and phosphate (D)</p> Signup and view all the answers

    What is the primary role of osteoclasts in bone tissue?

    <p>Breaking down and resorbing bone tissue (C)</p> Signup and view all the answers

    Which bone cell acts as stem cells and is responsible for producing new osteoblasts?

    <p>Osteogenic cells (C)</p> Signup and view all the answers

    If a bone has high collagen content but lacks hydroxyapatite, what would be its characteristic?

    <p>Very brittle (B)</p> Signup and view all the answers

    Which type of bone cell is considered the 'master' regulator of bone maintenance?

    <p>Osteocytes (B)</p> Signup and view all the answers

    What contribution do mineral salts make to hydroxyapatite in bone tissue?

    <p>Calcium phosphate (D)</p> Signup and view all the answers

    Which component of the extracellular matrix in bone tissue is responsible for its hardness?

    <p>Hydroxyapatite (B)</p> Signup and view all the answers

    What analogy best describes the function of trabecular bone in spreading force?

    <p>Spiral staircase (D)</p> Signup and view all the answers

    Which characteristic of trabecular bone allows it to resist forces from multiple directions?

    <p>Trabecular struts (C)</p> Signup and view all the answers

    What process is responsible for increasing the width of a bone through the addition of new bone matrix?

    <p>Appositional growth (C)</p> Signup and view all the answers

    Which cells are responsible for adding new bone matrix during bone remodeling?

    <p>Osteoblasts (D)</p> Signup and view all the answers

    What is the primary function of osteoclasts in bone remodeling?

    <p>Removing bone from the medullary cavity (A)</p> Signup and view all the answers

    Bone homeostasis is maintained through a balance between which two processes?

    <p>Osteoclast activity and bone formation (D)</p> Signup and view all the answers

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