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Embryo Development: Blastula Stage and Implantation

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Embryo Development: Blastula Stage and Implantation

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Questions and Answers

What is the consequence of gastrulation in embryonic development?

Formation of the neural crest

Formation of the mesoderm layer (correct)

Formation of the primitive streak

Formation of the surface ectoderm

Which structure defines the embryonic midline following gastrulation?

Neural crest

Primitive pit

Definitive endoderm

Notochord (correct)

What gives rise to the entire nervous system during embryonic development?

Endoderm

Neural crest

Surface ectoderm (correct)

Mesoderm

Which group of cells will become the specialized extraembryonic membranes during embryonic development?

Trophoblast (C) Signup and view all the answers

What is the role of the hypoblast during embryonic development?

Lines the blastocoel cavity (D) Signup and view all the answers

During placenta formation, which layer is mitotically inactive?

Syncytiotrophoblast (D) Signup and view all the answers

Where does the implantation process occur during embryonic development?

Between the inner cell mass and the invading trophoblast (D) Signup and view all the answers

What is the first event that marks the beginning of gastrulation?

Formation of the primitive streak (B) Signup and view all the answers

Which structure defines the rostro-caudal and medial-lateral axes of the embryo during gastrulation?

Primitive streak (D) Signup and view all the answers

During gastrulation, what process involves a cellular epithelial-to-mesenchymal transition?

Ingression (B) Signup and view all the answers