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Muscle Contraction Quiz
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Muscle Contraction Quiz

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@LegendaryHill

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Questions and Answers

What is the protein that composes the thick myofilaments?

  • Troponin
  • Tropomysin
  • Actin
  • Myosin (correct)

    • What are the small regular projections on each myosin filament called?

  • Tropomysin
  • Troponin
  • Crossbridges (correct)
  • Actin

    • What are the two additional proteins found in the thin myofilaments?

  • Myosin and actin
  • Myosin and troponin
  • Actin and tropomysin
  • Troponin and tropomysin (correct)

    • What causes the myosin crossbridges to interact with the actin receptor sites?

    <p>The presence of calcium ions</p> Signup and view all the answers

    What happens to the actin filaments during muscle contraction?

    <p>They slide past the myosin filaments</p> Signup and view all the answers

    What is homeostasis?

    <p>The ability of the body to maintain a stable internal environment</p> Signup and view all the answers

    Which of the following is an example of a function controlled by homeostasis mechanisms?

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

    What are some of the adaptive mechanisms that maintain homeostasis?

    <p>Chemical substances called hormones</p> Signup and view all the answers

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