Oral and Craniofacial Developmental Biology: Embryonic Development Stages
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Questions and Answers

What is the source of embryonic stem cells?

  • Gastrulation
  • Sheet of cells that give rise to epi-and hypoblast (correct)
  • Neural plate formation
  • Blastocyst
  • Which stage of embryonic development is responsible for the formation of the neural plate?

  • Neurulation
  • Neural plate formation (correct)
  • Gastrulation
  • Ectoderm formation
  • Which germ layer is responsible for the development of the gut, liver, and thyroid?

  • Mesoderm
  • Neural crest
  • Ectoderm
  • Endoderm (correct)
  • During which stage of embryonic development do the body walls start to fold?

    <p>Folding of the body walls</p> Signup and view all the answers

    Which of the following is a derivative of the mesoderm?

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

    What is the purpose of the neural crest cells?

    <p>To migrate from the neural tube</p> Signup and view all the answers

    At what age does the fusion of the symphysis menti occur?

    <p>During childhood</p> Signup and view all the answers

    What is the origin of the tissues that form the dental pulp?

    <p>Cranial neural crest cells</p> Signup and view all the answers

    Which of the following is NOT a growth site of the mandible?

    <p>The mid-sagittal plane</p> Signup and view all the answers

    What is the name of the signal that drives tooth development?

    <p>Odontogenic signal</p> Signup and view all the answers

    During which stage of tooth development is the dental follicle formed?

    <p>Cap stage</p> Signup and view all the answers

    What is the name of the tissue that forms the enamel of the tooth?

    <p>Dental organ</p> Signup and view all the answers

    What is the outermost layer of the embryo at the end of gastrulation?

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

    What is the anatomical structure labeled as 3 in the diagram?

    <p>Oral cavity</p> Signup and view all the answers

    Which structure grows at the same rate as the general body?

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

    At what age is the growth of the skull almost complete?

    <p>10 years old</p> Signup and view all the answers

    What is the innermost layer of the embryo at the end of gastrulation?

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

    When is the growth of the face complete?

    <p>With the eruption of the 3rd molars</p> Signup and view all the answers

    What is the name of the structure that produces mineralized tooth tissues during the late bell stage of tooth development?

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

    During the early bell stage of tooth development, which of the following histological features is NOT characteristic of this stage?

    <p>Dental pulp</p> Signup and view all the answers

    What is the name of the structure that provides the outermost layer of the enamel organ during the early bell stage of tooth development?

    <p>Outer enamel epithelium</p> Signup and view all the answers

    During the late bell stage of tooth development, which of the following cells is responsible for producing dentin?

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

    What is the name of the structure that forms the junction between the enamel organ and the dental papilla during the early bell stage of tooth development?

    <p>Cervical loop</p> Signup and view all the answers

    During the early bell stage of tooth development, which of the following histological features is characteristic of the enamel organ?

    <p>Stellate reticulum</p> Signup and view all the answers

    What is the anatomical feature located between the upper and lower lips?

    <p>Labiomental groove</p> Signup and view all the answers

    Which of the following anatomical features is NOT located in the palate?

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

    What is the name of the process by which the shape of the bone is restored?

    <p>Bone remodelling</p> Signup and view all the answers

    Which type of cells are responsible for breaking down bone tissue?

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

    What is the name of the structure that separates the roots of multi-root teeth?

    <p>Interradicular septum</p> Signup and view all the answers

    What is the name of the anatomical feature located at the junction of the upper and lower lips?

    <p>Oral commissures</p> Signup and view all the answers

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