Teratology Lecture 4: Environmental Factors and Teratogens
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Questions and Answers

By GD 7.5, what is the condition of the primary decidual zone cells?

  • Partially developed
  • Fully developed
  • Mostly present
  • Mostly disappeared (correct)

What is the expression of EGFR in the epiblast?

  • Neutral
  • Negative (correct)
  • Variable
  • Positive

On GD 6.5, what is the size of the scale bar in micrometers?

  • 200μm
  • 100μm (correct)
  • 50μm
  • 500μm

What happened to the mesometrial decidua on GD 7.5 in the control group?

<p>It greatly enlarged (A)</p> Signup and view all the answers

In the control group on GD 7.5, what was observed in the implantation site?

<p>Increase in size (A)</p> Signup and view all the answers

What is the description of the embryo on GD 7.5?

<p>Three separate cavities (C)</p> Signup and view all the answers

How did the implantation site appear in the RA-treated group?

<p>Circular and smaller (B)</p> Signup and view all the answers

What was observed in the embryos in the RA-treated group?

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

What was affected in the RA-treated group?

<p>Both maternal-embryonic interface and extra-embryonic tissues (C)</p> Signup and view all the answers

What was inhibited in the RA-treated group?

<p>Blood sinusoids formation (C)</p> Signup and view all the answers

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