Muscle Contraction and Relaxation
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Questions and Answers

What is the major constituent of thin filaments in muscle cells?

  • Actin (correct)
  • Myosin
  • Tropomyosin
  • Troponin

    • What type of muscle contractions are neurogenic in vertebrates?

  • Isometric muscle contractions
  • Smooth muscle contractions
  • Skeletal muscle contractions (correct)
  • Cardiac muscle contractions

    • What happens after the termination of muscle contraction?

  • Muscle relaxation occurs (correct)
  • Muscle shortening occurs
  • Muscle tension increases
  • Muscle fatigue sets in

    • What is the basic functional organelle in the skeletal muscle system?

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

    What type of muscle contraction can be described depending on the frequency of action potentials?

    <p>Twitch, summation, or tetanus</p> Signup and view all the answers

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