Muscle Cell Contractions
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Questions and Answers

Which type of muscle has motor units?

  • Both skeletal and cardiac muscle
  • Neither skeletal nor cardiac muscle
  • Cardiac muscle
  • Skeletal muscle (correct)
  • What provides electrical connections between cardiac muscle cells?

  • Sarcolemma
  • Fascia adherens
  • Mechanical junctions
  • Intercalated disks (correct)
  • What is the role of the sarcoplasmic reticulum in cardiac muscle cells?

  • Surrounds myofibrils
  • Generates action potentials
  • Stores calcium ions (correct)
  • Forms intercalated disks
  • Which muscle type has a higher oxidative capacity due to its high density of mitochondria?

    <p>Cardiac muscle</p> Signup and view all the answers

    What is the basic organization and composition of thick and thin filaments in cardiac muscle cells?

    <p>Comparable with skeletal muscle cells</p> Signup and view all the answers

    How are skeletal and cardiac muscle contractions described at the cellular level?

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

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