Embryonic Development: Primary Epithelial Band Formation
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Questions and Answers

What leads to the formation of the Primary epithelial band in the embryo?

  • Basal cells of the pharyngeal endoderm
  • Basal cells of the oral ectoderm (correct)
  • Neural crest cells
  • Mesenchymal cells of the oral ectoderm

    • At what stage does the formation of the Primary epithelial band occur in the embryo?

  • About 6 weeks old (correct)
  • About 10 weeks old
  • About 4 weeks old
  • About 8 weeks old

    • Where does the Primary epithelial band invade during its formation?

  • Pharyngeal endoderm along each of the arches dental future
  • Underlying ectomesenchyme along each of the arches dental future (correct)
  • Overlying ectomesenchyme along each of the arches dental future
  • Oral ectoderm along each of the arches dental future

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