Biomechanics and Mechanics Quiz
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Questions and Answers

What is the difference between static and dynamic systems?

  • Static systems have no acceleration, while dynamic systems have constant acceleration
  • Static systems are at rest or moving at a constant velocity, while dynamic systems are accelerating or decelerating (correct)
  • Static systems are always in motion, while dynamic systems are stationary
  • Static systems have a constant velocity, while dynamic systems have varying velocity

    • What are the cardinal planes?

  • Horizontal, vertical, and frontal planes
  • Frontal, sagittal, and transverse planes (correct)
  • Transverse, horizontal, and lateral planes
  • Sagittal, vertical, and lateral planes

    • What is the definition of flexion vs extension?

  • Flexion decreases the angle between two body segments, while extension increases it (correct)
  • Extension is a lateral movement, while flexion is a medial movement
  • Extension decreases the angle between two body segments, while flexion increases it
  • Flexion occurs around a horizontal axis, while extension occurs around a vertical axis

    • What is the center of gravity? What is the center of mass?

    <p>The center of gravity is the point where weight is evenly distributed; the center of mass is the point where all mass is concentrated</p> Signup and view all the answers

    What is the definition of osteopenia?

    <p>Loss of bone mass that leads to osteoporosis</p> Signup and view all the answers

    Where are the muscle spindle fibers located and what is their function?

    <p>In the muscles to detect changes in muscle length</p> Signup and view all the answers

    What is the function of synovial fluid?

    <p>To absorb shock in the joints</p> Signup and view all the answers

    What is the difference between concentric muscle action and eccentric muscle action?

    <p>Concentric - shortening of the muscle; Eccentric - lengthening of the muscle</p> Signup and view all the answers

    What is the parallel elastic component in muscle physiology?

    <p>A portion of connective tissue parallel to muscle fibers providing elasticity</p> Signup and view all the answers

    What are overuse injuries typically caused by?

    <p>Repetitive stress on a particular part of the body</p> Signup and view all the answers

    What is the difference between kinematics and kinetics?

    <p>Kinematics deals with motion parameters, while kinetics deals with forces.</p> Signup and view all the answers

    What is the cardinal plane where abduction and adduction occur?

    <p>Frontal plane</p> Signup and view all the answers

    What are the definitions of flexion vs extension?

    <p>Flexion reduces the angle between two body parts, while extension increases the angle.</p> Signup and view all the answers

    What do medial and lateral refer to?

    <p>Medial refers to movements away from the midline, while lateral refers to movements toward the midline.</p> Signup and view all the answers

    What is the main difference between acute and chronic conditions?

    <p>Acute conditions are severe and sudden, while chronic conditions are long-lasting.</p> Signup and view all the answers

    What is the primary reason for the development of osteoporosis?

    <p>Loss of bone mass due to an imbalance between osteoblasts and osteoclasts.</p> Signup and view all the answers

    What is the main function of synovial fluid?

    <p>Acting as a lubricant for smooth joint movement.</p> Signup and view all the answers

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