embriology
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Questions and Answers

What is the fate of the mesoderm?

  • Formation of neural tube
  • Differentiation of mesoderm (correct)
  • Formation of trilaminar disk
  • Folding of embryo

    • What structures do neural crest cells form?

  • Trilaminar disk
  • Pharyngeal arches (correct)
  • Bilaminar disk
  • Pouches

    • During which phase of the embryonic period does gastrulation occur?

  • Phase 1 (correct)
  • Phase 2
  • Phase 3
  • Phase 4

    • During which phase of prenatal development does gastrulation occur?

    <p>Embryonic period phase 1</p> Signup and view all the answers

    Which germ layer forms the bones and muscles of most of the body?

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

    What is the function of the notochord during gastrulation?

    <p>It tells the three germ layers what to do next</p> Signup and view all the answers

    Which germ layer forms the urogenital system?

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

    Which structure is formed by the first pharyngeal pouch in humans?

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

    What happens to the rest of the grooves in the pharyngeal arches?

    <p>They disappear</p> Signup and view all the answers

    Which cranial nerve is associated with the mastication muscles?

    <p>V (trigeminal)</p> Signup and view all the answers

    What is the fate of Meckel's cartilage in human development?

    <p>It disappears</p> Signup and view all the answers

    Which layer of the embryo forms the lining of the gastrointestinal tract?

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

    Which structures are derived from the 1st and 2nd pharyngeal arches?

    <p>Bones and muscles of the body (except head)</p> Signup and view all the answers

    During lateral folding of the embryo, what happens to the endodermal layer?

    <p>It bends and reaches towards each other to form the gut</p> Signup and view all the answers

    What does the neural tube turn into during development?

    <p>Brain and spinal cord</p> Signup and view all the answers

    During which phase of prenatal development does gastrulation occur?

    <p>Phase 1</p> Signup and view all the answers

    What structures do neural crest cells form?

    <p>Pharyngeal arches</p> Signup and view all the answers

    What is the fate of the mesoderm?

    <p>Forms the bones and muscles of most of the body</p> Signup and view all the answers

    Which germ layer forms the urogenital system?

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

    What structures arise from each pharyngeal arch, groove, and cleft?

    <p>Major structures</p> Signup and view all the answers

    What happens during week 1 and 2 of embryonic development?

    <p>Formation of trilaminar disk</p> Signup and view all the answers

    How does the neural tube form, and what happens to it?

    <p>Forms through folding of the embryo</p> Signup and view all the answers

    During which phase of prenatal development does the formation of the neural tube occur?

    <p>Phase 2</p> Signup and view all the answers

    What is the function of the notochord during gastrulation?

    <p>Tells the three germ layers what to do next</p> Signup and view all the answers

    Which germ layer does the intermediate mesoderm give rise to?

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

    What structures are formed by the paraxial mesoderm?

    <p>Bones and muscles of most of the body</p> Signup and view all the answers

    What is the fate of Meckel's cartilage in human development?

    <p>Forms the bones and muscles of most of the body</p> Signup and view all the answers

    Which structures are derived from the 1st and 2nd pharyngeal arches?

    <p>Bones and connective tissue of head</p> Signup and view all the answers

    What does the neural tube turn into during development?

    <p>Central nervous system</p> Signup and view all the answers

    What is the main function of the pharyngeal arches during embryonic development?

    <p>Formation of the bones and muscles of the head and neck</p> Signup and view all the answers

    During which phase of prenatal development does folding of the embryo occur?

    <p>Embryonic period phase 2</p> Signup and view all the answers

    What is the fate of the neural tube during development?

    <p>It turns into the brain and spinal cord</p> Signup and view all the answers

    Which germ layer forms the lining of the gastrointestinal tract?

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

    What structures are derived from the mesoderm?

    <p>Bones and muscles of the back</p> Signup and view all the answers

    What is the main function of the notochord during gastrulation?

    <p>Formation of the brain and spinal cord</p> Signup and view all the answers

    What is the fate of Meckel's cartilage in human development?

    <p>It regresses and disappears</p> Signup and view all the answers

    Which structure is formed by the second pharyngeal pouch in humans?

    <p>Inferior parathyroid</p> Signup and view all the answers

    Which cranial nerve is associated with the facial expression muscles?

    <p>VII (facial)</p> Signup and view all the answers

    What is the fate of Meckel's cartilage in human development?

    <p>Degenerates and disappears</p> Signup and view all the answers

    During which phase of prenatal development does cellular differentiation occur?

    <p>Fetus Phase 3</p> Signup and view all the answers

    What structures are derived from the 4th and 5th pharyngeal pouches?

    <p>Superior parathyroid</p> Signup and view all the answers

    What happens to the rest of the pharyngeal grooves in human development?

    <p>They disappear</p> Signup and view all the answers

    Which cranial nerve is associated with the mastication muscles?

    <p>V (trigeminal)</p> Signup and view all the answers

    What is the fate of the first pharyngeal groove in human development?

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

    Which structure is formed by the third pharyngeal pouch in humans?

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

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