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Law of Unequal Growth in Embryos
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Law of Unequal Growth in Embryos

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Questions and Answers

What is the future site of the vertebral column?

  • Neural tube
  • Notochord (correct)
  • Primitive node
  • Neural crest
  • During neurulation, what signals overlying ectoderm for the formation of the spinal cord and brain?

  • Intermediate mesoderm
  • Neural groove
  • Notochord (correct)
  • Paraxial mesoderm
  • Which structure begins to differentiate lateral to the notochord around week 3?

  • Notochord
  • Neural tube
  • Intermediate mesoderm (correct)
  • Neural crest
  • At what stage does the closure of the neural tube begin?

    <p>End of week 3</p> Signup and view all the answers

    What cavity is formed by the split of the lateral plate mesoderm?

    <p>Coelom ('cavity')</p> Signup and view all the answers

    What is formed by the division of mesoderm into three regions?

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

    Which primary brain vesicle does the forebrain develop from?

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

    'Breach of cloacal membrane' occurs at which stage of development?

    <p>8th week</p> Signup and view all the answers

    What process involves the formation of pronuclei, alteration of the ovum, and fusion of pronuclei during fertilization?

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

    Which structure proliferates and differentiates into two layers, including syncytiotrophoblast and cytotrophoblast?

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

    What characterizes the morula stage of development?

    <p>A ball of 16 or more cells resembling a mulberry</p> Signup and view all the answers

    What does the primitive streak on the dorsal surface of the epiblast lead to?

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

    During implantation, what disappears by the 5th day allowing the blastocyst to settle into the endometrium?

    <p>Zona pellucida</p> Signup and view all the answers

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