Development of the Muscular System Quiz
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Questions and Answers

Which type of muscle differentiates from splanchnic mesoderm surrounding the gut and its derivatives?

  • Cardiac muscle
  • Skeletal muscle
  • Smooth muscle (correct)
  • Iris muscle
  • From which type of mesoderm do the limb muscles develop by epitheliomesenchymal transformation?

  • Neuroectoderm
  • Paraxial mesoderm (correct)
  • Ectoderm
  • Splanchnic mesoderm
  • Which embryonic cells give rise to myoblasts, the embryonic muscle cells?

  • Mesenchymal cells (correct)
  • Mesothelial cells
  • MyoD cells
  • Neural crest cells
  • What activates transcription of muscle-specific genes and is considered an important regulatory gene for the induction of myogenic differentiation?

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

    Which type of muscle is derived from the neural crest in the head region?

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

    What process is dependent on the degree of mesenchymal cell differentiation for the induction of myogenesis by MyoD?

    <p>Epitheliomesenchymal transformation</p> Signup and view all the answers

    What is the first indication of myogenesis according to the text?

    <p>Activation of gene expression in myogenic cells</p> Signup and view all the answers

    What are the characteristic organelles that form in the cytoplasm of myotubes during muscle growth?

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

    Where do myogenic precursor cells originate from in response to molecular signals?

    <p>Paraxial mesoderm</p> Signup and view all the answers

    Which muscle-specific basic helix-loop-helix transcription factors are activated in precursor myogenic cells according to the text?

    <p>MyoD, MyoG, Myf-5, MRF4</p> Signup and view all the answers

    What results in the ongoing muscle growth in the fetus according to the text?

    <p>Fusion of myoblasts and myotubes</p> Signup and view all the answers

    Where do cells migrate to from the dorsomedial edge of the dermomyotome according to the text?

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

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