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 (D)</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 (D)</p> Signup and view all the answers

What is the result of gastrulation?

<p>Generation of 3 germ layers (B)</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 (C)</p> Signup and view all the answers

What is formed during the cleavage stage?

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

What is the significance of the trophectoderm?

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

What is the result of gastrulation?

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

What is the significance of the primitive streak?

<p>It is the site of gastrulation (D)</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 (B)</p> Signup and view all the answers

What is the significance of the medial-lateral axis?

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

What is the role of the epiblast?

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

What is the significance of the inner cell mass?

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

What is the result of neurulation?

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

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