Skeletal Muscle Structure and Function Quiz
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Questions and Answers

What is the structure that spans from one Z line to another Z line in a skeletal muscle?

  • Sarcomere (correct)
  • A band
  • Myofibril
  • I band

    • Which component of the sarcomere decreases in length during muscle contraction?

  • H zone
  • A band
  • I band (correct)
  • M line

    • What is the function of the thick filaments in a skeletal muscle?

  • Energy storage
  • Cross bridge formation (correct)
  • Myofilament attachment
  • Actin and ATP binding

    • What is the structure of the thin filaments in a skeletal muscle?

    <p>Actin and ATP binding sites</p> Signup and view all the answers

    What is the role of the sarcoplasmic reticulum in skeletal muscle?

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

    What is the structure of the thin filaments in a skeletal muscle?

    <p>Composed of actin, tropomyosin, and troponin; actin contains myosin-binding sites</p> Signup and view all the answers

    What is the role of the sarcoplasmic reticulum in skeletal muscle?

    <p>Stores and releases calcium ions for muscle contraction</p> Signup and view all the answers

    What is the structure of the thick filaments in a skeletal muscle?

    <p>Composed of myosin dimers, with heavy meromyosin containing the head and tail</p> Signup and view all the answers

    Which component of the sarcomere does NOT change in length during muscle contraction?

    <p>A band</p> Signup and view all the answers

    What components shorten during muscle contraction in a sarcomere?

    <p>I band and H zone</p> Signup and view all the answers

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