Questions and Answers 100% Pass
The craniofacial skeletal tissues are primarily derived from a combination of
___________ and _________? - ✔✔Cranial neural crest, mesoderm
Which of the following embryonic structures gives rise to Meckel's cartilage, the
precursor of the mandible? - ✔✔Pharyngeal Arch 1
Which of the following are necessary for cranial neural crest cell multipotency and
survival? - ✔✔FGF8
A farmer has several ewes that gave birth to lambs with cyclopia and midline
craniofacial defects. This is most likely due to which of the following? - ✔✔Exposure to
agents that antagonize Shh signaling
In the early embryo what signals must occur together in the splanchnic mesoderm for
cardiogenic mesoderm to be specified? - ✔✔DKK, Crescent, Cereberus, FGF8, and BMP
Which of the following represents an important outcome of looping? -
✔✔Establishment of left-right asymmetry
During heart development which of the following represent the correct temporal events
in morphogenesis? - ✔✔A. Formation of heart primordia, formation of the linear heart
tube, looping, and septation
Defects in endocardial cushions are often associated with craniofacial defects
suggesting a common link to neural crest cells. - ✔✔True
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