BIO 351 MODULE 5 UPDATED ACTUAL QUESTIONS
AND CORRECT ANSWERS
Question:
1. The craniofacial skeletal tissues are primarily derived
from a combination of ___________ and _________?
Answer:
Cranial neural crest, mesoderm
Question:
2. Which of the following embryonic structures gives rise to
Meckel's cartilage, the precursor of the mandible?
Answer:
Pharyngeal Arch 1
Question:
3. Which of the following are necessary for cranial neural
crest cell multipotency and survival?
Answer:
FGF8
Question:
4. 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?
Answer:
Exposure to agents that antagonize Shh signaling
Question:
5. In the early embryo what signals must occur together in
the splanchnic mesoderm for cardiogenic mesoderm to
be specified?
Answer:
DKK, Crescent, Cereberus, FGF8, and BMP
Question:
6. Which of the following represents an important outcome
of looping?
Answer:
Establishment of left-right asymmetry
AND CORRECT ANSWERS
Question:
1. The craniofacial skeletal tissues are primarily derived
from a combination of ___________ and _________?
Answer:
Cranial neural crest, mesoderm
Question:
2. Which of the following embryonic structures gives rise to
Meckel's cartilage, the precursor of the mandible?
Answer:
Pharyngeal Arch 1
Question:
3. Which of the following are necessary for cranial neural
crest cell multipotency and survival?
Answer:
FGF8
Question:
4. 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?
Answer:
Exposure to agents that antagonize Shh signaling
Question:
5. In the early embryo what signals must occur together in
the splanchnic mesoderm for cardiogenic mesoderm to
be specified?
Answer:
DKK, Crescent, Cereberus, FGF8, and BMP
Question:
6. Which of the following represents an important outcome
of looping?
Answer:
Establishment of left-right asymmetry
