Embryology Moodle Quiz 2
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Questions and Answers

Cleft palate is a developmental anomalie that results from:

  • the failure of fusion of the two medial nasal processes and the maxillary processes (correct)
  • the failure of fusion of the palatine shelves and the medial nasal processes
  • the failure of fusion of the two medial nasal processes
  • the failure of fusion of the palatine shelves together and the nasal septum (correct)

    • Duing childhood development, at age 4, environmental factors such as too much fluoide, can disrupt the amelogenesis process for permanent teeth.

    True (A)

    Ameloblasts form conical projections called Tomes Processes during which of the following stages of amelogenesis:

  • secretory (correct)
  • desmolytic
  • protective
  • maturative
  • morphogenic

    • Differentiation of ameloblasts from pre-ameloblasts takes place in which of the following stages of tooth development?

    <p>Bell stage (B)</p> Signup and view all the answers

    Enamel, gingiva and the skin are direct derivatives of the ectoderm.

    <p>True (A)</p> Signup and view all the answers

    During amelogenesis which cellular layer of the enamel organ collapses to allow for space for the ameloblasts:

    <p>stellate reticulum (D)</p> Signup and view all the answers

    During fetal development, amelogenesis for all primary teeth is completed before birth:

    <p>True (A)</p> Signup and view all the answers

    During odontogenesis, the dental sac gives rise to:

    <p>the supporting structures of the teeth (A)</p> Signup and view all the answers

    Odontogenesis starts with the following cellular layers at its initiation stage:

    <p>ectomesenchyme and oral epithelium (A)</p> Signup and view all the answers

    Select the single best answer:

    <p>The stellate reticulum plays a key role in amelogenesis by providing nutients to the ameloblasts (C)</p> Signup and view all the answers

    Select the single best answer:

    <p>All oral tissues originate from the ectoderm and the ectomesenchyme (neural crest cells) (D)</p> Signup and view all the answers

    All oral tissues originate from the ectoderm and the ectomesenchyme (neural crest cells)

    <p>All of the above (B)</p> Signup and view all the answers

    The origin of the dento-gingival junction is the:

    <p>Reduced enamel epithelium (C)</p> Signup and view all the answers

    The development of the face begins in:

    <p>week 4 (B)</p> Signup and view all the answers

    The development of the secondary palate:

    <p>creates the barrier between the oral and nasal cavities (A)</p> Signup and view all the answers

    The lifecycle of the ameloblast is:

    <p>limited to the time the tooth erupts (D)</p> Signup and view all the answers

    The long junctional epithelium originates from:

    <p>Ectoderm → oral epithelium → outer enamel epithelium (C)</p> Signup and view all the answers

    The morphology of the tooth crown starts to be determined at which stage of development:

    <p>early bell stage (A)</p> Signup and view all the answers

    The prevalence of cleft lip and palate in the UK is approximately 1 in 700 live births:

    <p>True (A)</p> Signup and view all the answers

    The lifecycle of the odontoblast:

    <p>continues throughout the life of the tooth (A)</p> Signup and view all the answers

    Which branchial arches do the facial muscles derive from?

    <p>II (B)</p> Signup and view all the answers

    Which branchial arches do the muscles of mastication derive from?

    <p>I (B)</p> Signup and view all the answers

    Which cellular layer of the enamel organ shrinks during amelogenesis to allow for space for the ameloblasts?

    <p>stellate reticulum (A)</p> Signup and view all the answers

    Which two cellular layers are present at the dental lamina stage of tooth development?

    <p>oral epithelium and ectomesenchyme (B)</p> Signup and view all the answers

    Which branchial arches does the trigeminal nerve derive from?

    <p>I (C)</p> Signup and view all the answers

    Which stage of tooth development is the morphology of the tooth crown determined?

    <p>bell stage (A)</p> Signup and view all the answers

    Which statement best describes the development of the secondary palate?

    <p>It creates the barrier between the oral and nasal cavities. (A)</p> Signup and view all the answers

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