Development of NS
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Questions and Answers

What is the primary consequence of the failure of closure of the anterior neuropore?

  • Spina Bifida
  • Anencephaly
  • Microcephaly
  • Exencephaly (correct)
  • What major structure is formed from the neural canal during development?

  • Epidermis of skin
  • Pituitary gland
  • Central Nervous System (correct)
  • Facial bones
  • Which condition is characterized by a small brain housed in a small cranium?

  • Microcephaly (correct)
  • Anencephaly
  • Exencephaly
  • Spina Bifida
  • Which part of the neural tube is affected in spina bifida?

    <p>Caudal part of vertebrae</p> Signup and view all the answers

    Which of the following is NOT a derivative of neural crest cells?

    <p>Epidermis of skin</p> Signup and view all the answers

    What are the three primary brain vesicles formed during early brain development?

    <p>Prosencephalon, Mesencephalon, Rhombencephalon</p> Signup and view all the answers

    Which secondary brain vesicle is responsible for forming structures like the thalamus and hypothalamus?

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

    What type of cells are responsible for producing the myelin sheath in the peripheral nervous system?

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

    What is the first structure formed that eventually becomes the neural tube during the process of neurulation?

    <p>Neural plate</p> Signup and view all the answers

    What major defect is characterized by the failure of the neural tube to close at the cranial end?

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

    Which layer of the trilaminar embryonic disc primarily gives rise to the Central Nervous System (CNS)?

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

    During the development of the neural canal into the ventricular system, which structure is formed from the neural tube?

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

    Which of the following is a derivative of the neural crest during development?

    <p>Sensory neurons</p> Signup and view all the answers

    What mechanism initiates the formation of the neural plate from overlying ectoderm?

    <p>Notochord stimulation</p> Signup and view all the answers

    What early developmental structure gives rise to both neurons and glial cells?

    <p>Neural tube</p> Signup and view all the answers

    Which condition is defined by excessive accumulation of cerebrospinal fluid in the brain ventricles?

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

    What is the main role of glialblast cells after the production of neuroblasts ceases?

    <p>They migrate to mantle and marginal layers.</p> Signup and view all the answers

    Which type of cells originate from neuroepithelial cells and are responsible for myelination in the central nervous system (CNS)?

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

    What is a distinctive feature of Schwann cells compared to oligodendrocytes?

    <p>They originate from neural crest cells.</p> Signup and view all the answers

    Which developmental abnormality is characterized by the failure of the cranial end of the neural tube to close?

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

    What structure in the developing spinal cord separates the alar and basal plates?

    <p>Sulcus limitans</p> Signup and view all the answers

    Which statement accurately describes the differentiation process of neuroepithelial cells?

    <p>They can differentiate into ependymal cells.</p> Signup and view all the answers

    What structure is described as the direct continuation of the spinal cord and may have a similar organization?

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

    Which type of cells are primarily involved in the immune response within the central nervous system?

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

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