Primitive Node and Prenotochordal Cells Cross-section Quiz
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Questions and Answers

What is the fate of the cells that move downward and to the sides in the primitive node when cut cross-sectionally?

  • Form a yolk sac
  • Fill the blastocoel cavity
  • Become ectoderm
  • Displace hypoblast to form endoderm (correct)
  • In the formation of the notochord, what cells become intercalated with endodermal cells initially?

  • Ectoderm cells
  • Primitive node cells
  • Prenotochordal cells (correct)
  • Paraxial mesoderm cells
  • What is the origin of the notochordal plate that gets intercalated with endodermal cells?

  • Endoderm
  • Intermediate mesoderm
  • Ectoderm
  • Mesoderm (correct)
  • Which embryonic germ layer do the ingressing cells become in the process described?

    <p>Mesoderm</p> Signup and view all the answers

    What are the three embryonic germ layers formed as a result of the migration and displacement processes?

    <p>Ectoderm, Endoderm, Mesoderm</p> Signup and view all the answers

    What determines the cranial to caudal sequence of formation of the definitive notochord?

    <p>Progression of formation from cephalic to caudal region</p> Signup and view all the answers

    Which tissue will eventually differentiate to form the epicardium and myocardium of the heart?

    <p>Mesenchymal cells</p> Signup and view all the answers

    What will the mesenchymal cells derived from the splanchnic mesoderm give rise to in blood vessels?

    <p>Blood corpuscles</p> Signup and view all the answers

    Which structure will arise from the intermediate mesoderm and be part of the urogenital units?

    <p>Renal pelvis</p> Signup and view all the answers

    What will differentiate to form the visceral peritoneum of the peritoneal cavity?

    <p>Mesenchymal cells</p> Signup and view all the answers

    Which cells will give rise to the collecting tubules of the kidney?

    <p>Mesenchymal cells</p> Signup and view all the answers

    Which mesodermal structure gives rise to the muscles of the trunk and limbs?

    <p>Paraxial mesoderm</p> Signup and view all the answers

    In the intermediate mesoderm, what structures will persist if the embryo is female?

    <p>Mullerian ducts</p> Signup and view all the answers

    Which mesodermal component participates in the formation of the vertebrae or the axial skeleton?

    <p>Sclerotome</p> Signup and view all the answers

    Which system arises mainly from ectoderm according to the provided text?

    <p>Nervous system</p> Signup and view all the answers

    Endocrine glands like the pituitary gland primarily arise from which germ layer?

    <p>Ectoderm</p> Signup and view all the answers

    'Mesonephric ducts will form the ductus epididymis and ductus deferens' is a statement related to which sex's embryo according to the text?

    <p>Male</p> Signup and view all the answers

    What is the primary function of the chorionic folds in swine?

    <p>Aiding in nutrient exchange between the mother and fetus</p> Signup and view all the answers

    In which species does the chorion develop into primary, secondary, and tertiary villi?

    <p>Primates</p> Signup and view all the answers

    What happens in the labyrinthine architecture of rodents?

    <p>Merging of chorionic villi surrounding maternal blood lacunae</p> Signup and view all the answers

    What role does the uterine epithelium play in the placental complex formation?

    <p>Acting as a barrier against harmful substances</p> Signup and view all the answers

    Which layer is involved in the initial formation of the placenta complex?

    <p>Perimetrium</p> Signup and view all the answers

    What characterizes the chorionic epithelium's interaction with maternal tissues?

    <p>Establishment of primary, secondary, and tertiary villi</p> Signup and view all the answers

    Which extraembryonic membrane is responsible for temporarily and permanently providing care and maintenance of the embryo?

    <p>Amnion</p> Signup and view all the answers

    What is the origin of the extraembryonic mesoderm in the chorion?

    <p>Splanchnopleuric</p> Signup and view all the answers

    Which outgrowth is an extension of the hindgut and is lined with endoderm fused with extraembryonic mesoderm?

    <p>Allantois</p> Signup and view all the answers

    During embryonic development, which cells spread outward from the region of the embryo to become the extraembryonic mesoderm?

    <p>Mesenchymal cells</p> Signup and view all the answers

    What embryonic structure forms a hood above the developing embryo?

    <p>Amnion</p> Signup and view all the answers

    Which layer forms the outermost part of the chorion?

    <p>Ectoderm</p> Signup and view all the answers

    What is the function of the yolk sac during embryonic development?

    <p>Nourishment</p> Signup and view all the answers

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