Introduction to Embryology
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Questions and Answers

What is the origin of the central nervous system?

  • Neural crest cells
  • Axial mesoderm
  • Neural plate (correct)
  • Ectoderm

    • What signals from surrounding tissues pattern the neural tube?

  • Signals from the notochord (correct)
  • Signals from the mesoderm
  • Signals from the ectoderm
  • Signals from the neural crest cells

    • What is the result of the fusion of the body wall?

  • Fusion of the lateral folds in the ventral midline (correct)
  • Formation of the neural tube
  • Formation of the neural plate
  • Formation of the notochord

    • What are the migratory cells from the dorsal neural tube?

    <p>Neural crest cells</p> Signup and view all the answers

    What do the neural crest cells in the head give rise to?

    <p>Melanocytes, Cranial ganglia, and Craniofacial skeleton</p> Signup and view all the answers

    What is the result of gastrulation?

    <p>Generation of 3 germ layers</p> Signup and view all the answers

    What is the significance of understanding normal development?

    <p>To understand the causes and genetics of birth defects</p> Signup and view all the answers

    What is formed during the cleavage stage?

    <p>A ball of cells called a morula</p> Signup and view all the answers

    What is the significance of the trophectoderm?

    <p>It forms the placenta</p> Signup and view all the answers

    What is the result of gastrulation?

    <p>Formation of three germ layers</p> Signup and view all the answers

    What is the significance of the primitive streak?

    <p>It is the site of gastrulation</p> Signup and view all the answers

    What is the result of the migration of cells from the neural tube?

    <p>Formation of the neural crest</p> Signup and view all the answers

    What is the significance of the medial-lateral axis?

    <p>It determines the back-belly axis</p> Signup and view all the answers

    What is the role of the epiblast?

    <p>It generates the embryo</p> Signup and view all the answers

    What is the significance of the inner cell mass?

    <p>It generates the embryo</p> Signup and view all the answers

    What is the result of neurulation?

    <p>Formation of the neural tube</p> Signup and view all the answers

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