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Gastrulation — Second Week & Germ Layers
Embryology Question Bank
Embryology Question Bank
Gastrulation
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Gastrulation MCQs: practice questions
Sample Gastrulation multiple-choice questions from Second Week & Germ Layers.
How do epiblast cells form definitive endoderm?
- A. They arise from trophoblast
- B. They migrate through the amniotic cavity
- C. They arise from extraembryonic mesoderm
- D. They remain in the epiblast
- E. They migrate through the primitive streak and displace hypoblast cells
What is the first indication of gastrulation?
- A. Formation of somites
- B. Formation of tertiary villi
- C. Formation of the amniotic cavity
- D. Formation of the neural tube
- E. Formation of the primitive streak
Which germ layer forms the epidermis?
- A. Extraembryonic mesoderm
- B. Ectoderm
- C. Endoderm
- D. Mesoderm
- E. Hypoblast
What is intraembryonic mesoderm?
- A. Mesoderm of the placenta only
- B. Mesoderm surrounding the yolk sac in week 2
- C. Maternal endometrial stroma
- D. Mesoderm formed during week 3 by migrating epiblast cells
- E. Mesoderm derived from trophoblast
Which embryonic layer gives rise to all three definitive germ layers?
- A. Hypoblast
- B. Trophoblast
- C. Extraembryonic mesoderm
- D. Cytotrophoblast
- E. Epiblast
What is the relationship between epiblast and definitive ectoderm?
Which mesodermal subdivision forms kidneys and gonads?
What is the significance of the primitive streak?
Which germ layer forms the neural plate?
What is the major result of gastrulation?
Which germ layer forms the epithelial lining of the gastrointestinal tract?
Which signaling pattern contributes to left-right axis determination?
What is the embryonic disk called after gastrulation?
What causes formation of the primitive streak?
Which process establishes the three definitive germ layers?
Which germ layer forms the dermis and connective tissue of most of the body?
Which structure lies cranial to the primitive node?
What does the remaining epiblast become after mesoderm and endoderm form?
What are the three components of the primitive streak?
Which structure lies caudal to the primitive streak?
At which end of the primitive streak is the primitive node located?
What happens to epiblast cells migrating through the primitive streak?
What happens to lateral mesoderm when the intraembryonic coelom forms?
Which structure marks the future mouth during gastrulation?
What role does serotonin have in early embryonic patterning?
Which mesodermal subdivision forms the cardiogenic region?
What is the role of the primitive groove?
Which structure marks the future anus during gastrulation?
Which germ layer forms most connective tissue and muscle?
Which mesodermal subdivision forms somites?