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Lever Systems in the Body
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Lever Systems in the Body

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Questions and Answers

Which lever system occurs when the load is between the effort and pivot?

  • Second-class levers (correct)
  • Third-class levers
  • Fourth-class levers
  • First-class levers
  • In a wheelbarrow, which part serves as the pivot for the second-class lever?

  • The load in the trey
  • The person's force
  • The handles
  • The wheel (correct)
  • What is an example of a first-class lever in the human body?

  • Sweeping with a broom
  • Bending the neck backwards (correct)
  • Standing on tip toes
  • Bending the elbow
  • Which muscle provides the force needed for neck extension in the first-class lever of the atlanto-occipital joint?

    <p>Muscles at the back of the neck</p> Signup and view all the answers

    What is the movement known as when a person stands on their tip toes in a second-class lever system?

    <p>Plantar flexion</p> Signup and view all the answers

    What is the primary purpose or function of a lever system in the human body?

    <p>To produce a mechanical advantage</p> Signup and view all the answers

    What are the four primary parts that make up a lever system in the body?

    <p>Bone, joint, muscle, and weight</p> Signup and view all the answers

    In the example of a person lifting a cup of water to their mouth, what acts as the lever?

    <p>The forearm</p> Signup and view all the answers

    What is the term used to describe the force generated by the contraction of the muscles in a lever system?

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

    How many primary types of levers are there in the human body?

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

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