Question Bank
Bilaminar Germ Disc — Second Week & Germ Layers
Embryology Question Bank
Embryology Question Bank
Bilaminar Germ Disc
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Bilaminar Germ Disc MCQs: practice questions
Sample Bilaminar Germ Disc multiple-choice questions from Second Week & Germ Layers.
Which two cavities border the bilaminar embryonic disk?
- A. Amniotic cavity and neural tube
- B. Pericardial cavity and amniotic cavity
- C. Yolk sac and primitive streak
- D. Amniotic cavity and yolk sac
- E. Chorionic cavity and uterine cavity
What are the two layers of the bilaminar embryonic disk?
- A. Cytotrophoblast and syncytiotrophoblast
- B. Epiblast and hypoblast
- C. Mesoderm and endoderm
- D. Trophoblast and embryoblast
- E. Ectoderm and mesoderm
What structure marks the future caudal anal region?
- A. Cloacal membrane
- B. Amnion
- C. Chorionic cavity
- D. Prochordal plate
- E. Connecting stalk
What future structure is indicated by the cloacal membrane?
- A. Umbilicus
- B. Heart
- C. Mouth
- D. Anus
- E. Notochord
Which three tissues form the definitive chorion?
- A. Extraembryonic visceral mesoderm and hypoblast
- B. Endoderm, mesoderm, and ectoderm
- C. Epiblast, hypoblast, and endoderm
- D. Cytotrophoblast and embryoblast only
- E. Extraembryonic somatic mesoderm, cytotrophoblast, and syncytiotrophoblast
What structure suspends the embryoblast within the chorionic cavity?
Which trophoblast layer is mitotically active?
Where is extraembryonic mesoderm located?
What is the trophoblast primarily involved in forming?
Where does the amniotic cavity develop?
What happens to the original yolk sac during week 2?
Which trophoblast layer actively invades the endometrium?
What is the primary role of the connecting stalk?
What structure marks the future cranial end and mouth region?
What is the exocoelomic membrane associated with?
What does the trophoblastic lacunar network establish?
What is the relationship of the amnion and yolk sac to the bilaminar disk?
What does the amnion provide for the developing embryo?
What is the position of the embryonic disk at day 14?
What forms the lining of the yolk sac?
What future structure is indicated by the prochordal plate?
What is the main nutrient source for the embryoblast during week 2?
What is the chorionic cavity?
What is the function of decidual cells during week 2?
What is the embryoblast capable of forming?
What is the developmental significance of the bilaminar disk?
What is the prochordal plate?
What forms the floor of the amniotic cavity?
Where is the cloacal membrane relative to the primitive streak?
What is the embryonic disk at the end of week 2?