Muscular System and Muscle Types Quiz
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Questions and Answers

Which organelle is responsible for storing and releasing Ca2+ in muscle cells?

  • Nuclei
  • Transverse tubules (T-tubules)
  • Sarcoplasmic reticulum (SR) (correct)
  • Mitochondria

    • What is the functional unit of muscle contraction?

  • Sarcomere (correct)
  • Mitochondrion
  • Tendon
  • Myofibril

    • What are the thin filaments in a muscle cell composed of?

  • Actin, myosin, ATPase
  • Actin, troponin, tropomyosin (correct)
  • Actin, troponin, myosin
  • Actin, tropomyosin, myosin

    • What is the function of T-tubules in muscle cells?

    <p>Conducting electrical impulses</p> Signup and view all the answers

    Which structure divides a muscle cell into sections and is considered the functional unit of muscle contraction?

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

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