Forces affecting Musculoskeletal System: Bones Quiz
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Questions and Answers

What is the most complicated element in the musculoskeletal system in terms of response to external forces?

  • Bones
  • Muscles (correct)
  • Tendons
  • Ligaments
  • Which element in the musculoskeletal system is deformable and responds differently to external forces?

  • Bones (correct)
  • Tendons
  • Ligaments
  • Muscles
  • In a normal joint, which of the following is the usual situation regarding degrees of freedom?

  • 3 degrees of displacement and 3 degrees of rotation
  • 2 degrees of displacement and 2 degrees of rotation
  • 1 degree of displacement and 2 degrees of rotation
  • No displacement and 1 to 2 rotations (correct)
  • Which joint example is used to analyze joints with only a single rotation axis and no displacements?

    <p>Elbow</p> Signup and view all the answers

    What is the main difference between different classes of joints in the musculoskeletal system?

    <p>Degree of movement/freedom</p> Signup and view all the answers

    In an elbow, what can be modified in terms of angle?

    <p>Angle alpha</p> Signup and view all the answers

    Which element in the musculoskeletal system is typically affected in a simplified joint like the elbow, focusing only on flexion and extension?

    <p>Bones</p> Signup and view all the answers

    What determines the minimum set of forces required to reach equilibrium in a joint?

    <p>The load on the system, the muscular force, and the reaction force at the joint</p> Signup and view all the answers

    In which lever class do the load (FL) and the muscular force (Fm) act close to each other?

    <p>3rd class lever</p> Signup and view all the answers

    What happens when the distance to the joint is different in two situations with similar loads and orientations?

    <p>The muscular force required changes</p> Signup and view all the answers

    In which situation will the biceps need to apply a stronger force: flexed or extended?

    <p>Extended, close to 180º</p> Signup and view all the answers

    What can happen if the reaction force Fa is large in response to a large X component?

    <p>Stress and tear of ligaments</p> Signup and view all the answers

    What determines how high the reaction force Fa will have to be?

    <p>The load, the distance to the joint, and orientation</p> Signup and view all the answers

    What model can be applied in some joints of the body for reaching equilibrium?

    <p>Lever model</p> Signup and view all the answers

    What does F1 ·d1 = F2 · d2 represent in a lever?

    <p>Equilibrium condition for a 1st class lever</p> Signup and view all the answers

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