Muscle Contraction Mechanism
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Questions and Answers

What initiates the contraction of muscles?

  • Action potential (correct)
  • Sliding actin over myosin
  • Relaxation
  • Sarcoplasmic reticulum

    • What is released from the sarcoplasmic reticulum during muscle contraction?

  • Myosin
  • Sarcomere
  • Ca++ (correct)
  • Actin

    • What is the basic unit of muscle contraction called?

  • Sarcoplasmic reticulum
  • Sarcomere (correct)
  • Actin
  • Myosin

    • What is the membrane of a muscle cell responsible for regulating the entry and exit of materials?

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

    Which structure in a muscle cell stores the calcium ions needed for muscle contractions?

    <p>Sarcoplasmic reticulum</p> Signup and view all the answers

    What binds to actin and causes muscle contractions in a muscle cell?

    <p>Thick filament</p> Signup and view all the answers

    What is the membrane of a muscle cell responsible for regulating the entry and exit of materials?

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

    Which structure in a muscle cell stores the calcium ions needed for muscle contractions?

    <p>Sarcoplasmic reticulum</p> Signup and view all the answers

    What binds to actin and causes muscle contractions in a muscle cell?

    <p>Thick filament</p> Signup and view all the answers

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