KROK 1 2016 – Question 18 · KROK (Medicine) · Histology, Cytology, and Embryology
An infant has been diagnosed with microcephaly. Doctors suspect that this brain disorder developed due to the fact that the mother had been taking actinomycin D during her pregnancy. What germinal layers have been affected by this teratogen?
- A. Ectoderm
- B. Entoderm
- C. All germinal layers
- D. Entoderm and mesoderm
- E. Mesoderm
Hint
Trace the brain back to its embryonic origin and ask which germ layer that tissue comes from, rather than thinking about the drug's general toxicity.
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