Embryology Quiz: WIUL and Nasal Placodes Development
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Questions and Answers

In Which layer the induction process start at ?

  • Ectoderm
  • mesoderm
  • Endoderm (correct)
  • Neural crest cells
  • Neural plate is a thickening of ______ layer?

  • Ectoderm
  • mesoderm (correct)
  • Endoderm
  • Neural Crest cells
  • Which type of cells separate from the neural fold at the time of neural tube closure ?

  • Neural crest cells
  • ectomesenchymal cells (correct)
  • Progenitor cells
  • A and B are correct
  • Which term describes the margins on both sides of the neural groove ?

    <p>Neural plate</p> Signup and view all the answers

    During the ___th to _____th wiul , the early face develops from ____ processes .

    <p>5th to 6th , 7</p> Signup and view all the answers

    What is the structure that eventually closes to form the neural tube?

    <p>Neural groove</p> Signup and view all the answers

    During which week of intrauterine life does neural tube formation occur?

    <p>Third week</p> Signup and view all the answers

    What structures lie between the forebrain and the developing heart at the third week of intrauterine life?

    <p>Primitive oral cavity (stomodeum) and neural tube</p> Signup and view all the answers

    Which structure is not mentioned as being involved in the early embryonic development at the third week of intrauterine life?

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

    First arch cartilage degenerates except its ____ end which ossifies to form the ____bone of the middle ear.

    <p>dorsal , external auditory meatus</p> Signup and view all the answers

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