Nervous System & Sense Organs

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excalibolg
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293737
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Nervous System & Sense Organs
Updated:
2015-01-24 15:26:43
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Embryology
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F*** this shit !! -_-
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  1. 1.     
    Which structures are derived from the optic cup?

    a.      
    neural retina

    b.     
    iris epithelium

    c.      
    pigment layer of the retina

    d.     
    ciliary body
    All of the above
  2. The optic nerve is derived from what embryonic tissue?

    a.      
    nueral crest

    b.     
    head mesenchyme

    c.      
    endoderm

    d.     
    mesoderm

    e.      
    endoderm
    A
  3. Which portion of the ear is derived from endoderm?

    a.      
    semicircular canals

    b.     
    tympanic cavity

    c.      
    external auditory meatus

    d.     
    bony labyrinth

    e.      
    cochlea
    B
  4. Which portion of the ear is derived from pharyngeal pouche(s)?

    a.      
    semicircular canals

    b.     
    tympanic cavity

    c.      
    external auditory meatus

    d.     
    bony labyrinth

    e.      
    cochlea
    D - ectodermal
  5. Which of the following structures is derived from mesoderm?

    a.      
    optic nerve

    b.     
    retina

    c.      
    iris epithelium

    d.     
    superior oblique muscle
    D
  6. The otic vesicle does NOT develop into the:

    a.      
    membranous cochlea

    b.     
    endyolymphatic duct

    c.      
    saccule

    d.     
    otic placode
    D
  7. Neural crest cells differentiate into:

    a.      
    postganglionic sympathetic cell bodies

    b.     
    cells of the inf. mesenteric ganglion

    c.      
    adrenal medullary cells

    d.     
    cells of the enteric plexus
    All
  8. The ganglia of the autonomic nervous system are derived from:

    a.      
    ectoderm

    b.     
    endoderm

    c.      
    both

    d.     
    neither
    A
  9. Of the following item most closely associated with the regulation
    of the visceral and endocrione functions is:

    a.      
    telencephalon

    b.     
    diencephalon

    c.      
    mesencephalon

    d.     
    metencephalon

    e.
    myelencephalon
    B
  10. Of the following items most closely associated with the pons is:

    a.      
    telencephalon

    b.     
    diencephalon

    c.      
    mesencephalon

    d.     
    metencepahlon

    e.      
    myelencephalon
    D
  11. . Of the following items most closely associated with visual
    reflexes is:

    a.      
    telencephalon

    b.     
    diencephalon

    c.      
    mesencephalon

    d.     
    metencephalon

    e.      
    myelencephalon
    C
  12. Which of the following ,  the
    one most closely associated with the 3rd ventricle is:

    a.      
    telencephalon

    b.     
    diencephalon

    c.      
    mesencephalon

    d.     
    metencephalon

    e.      
    myelencephalon
    B
  13. Which of the following, the one most closely associated with the
    cerebrum is:

    a.      
    telencephalon

    b.     
    diencephalon

    c.      
    mesencephalon

    d.     
    metencephalon

    e.      
    myelencephalon
    A
  14. Myelomingocele is often associated with a caudal displacement of
    the medulla and a portion of the cerebellum into the vertebral cana.

    a.      
    true

    false
    • A - nervous tissue and meningeal tissue heraniate through a cleft in spinal cord
    • Also blocks CSF flow
  15. The sympathetic nervous system is derived mostly from neural crest
    cells.

    a.      
    true

    b.     
    false
    A
  16. . Spina bifida occulta and encephalomeningocele results from a
    defect in neural tube closure

    a.      
    true

    b.     
    false
    • B - Spina biffida OCCULTA : neural arch defect of vertebral column
    • Meningeophele : herniation of meninges and defect of calvaria
  17. Micorglial cells arise from gliablast after the production of
    neuroblast has ceased

    a.      
    true

    b.     
    false
    B
  18. During the maturation of the nervous system:

    a.      
    fiber tracts appear to become myelinated about the time they start
    to function

    b.     
    all myelination of the nerve fibers is by oligodendroglail cells

    c.      
    the first reflexes appear in the caudal region

    d.     
    there is no movement of the embryo/ fetus until 15th
    week
    A - Movement starts : 3rd month
  19. . Cerebrospinal fliud:

    a.      
    is produced in chisoid plexus

    b.     
    circulates in the ventricular system of the brain and in the
    subarachnoid space

    c.      
    re-enters the venous blood at the arachnoid granulations

    d.     
    blockage of its circulation can lead to internal or external
    hydrocephalus
    All
  20. In the development of the nervous system:

    a.      
    there are three primary brain vesicles

    b.     
    during the 5th week, each brain vesicle subdivides into
    2 parts

    c.      
    the pontine flexure is in a direction opposite the mesencephalic
    and cervical flexure

    d.     
    neural epithelial cells are found in the mantle layer
    A, C, D
  21. In the development of the nervous system:

    a.      
    the sulcus limitans is found in the diencephalon

    b.     
    the infundibulum is an outgrowth of the diencephalon that develops
    into the neuroepiphysis

    c.      
    sensory neuclei in the hindbrain lie ventral to the sulcus limitans

    d.     
    the inner ear is derived from surface ectoderm
    B, D
  22. In the development of the nervous system

    a.      
    the neural groove forms from the neural plate

    b.     
    the neural folds are composed of neuroepithelial cells

    c.      
    the neural tube maintains temporary contact with the chorionic 
    cavity via neuropores

    d.     
    neuroepithelial cells gives rise to both neuroblast and glialblast
    A; B, D
  23. . Identify the correct association(s):

    a.      
    basal plate – sensory neurons

    b.     
    mantle layer – neuroblast

    c.      
    marginal layer – gray matter

    d.
    floor plate – choroid plexus
    B,C
  24. With the respect to the nervous system, which of the following is correct:

    a.      
    a muscle’s nerve supply can be used as an indicator of its level of
    origin and path of migration

    b.     
    Rathke’s pouch is an outgrowth of oral ectoderm that becomes the
    anterior lobe of the hypophysis

    c.      
    the sulcus limitans marks the boundary between motor and sensory
    areas

    d.
    sensory nuclei in the hindrabin lie ventral to the motor nuclei
    A,B,C
  25. . In the list below, which embryonic structures are correctly
    matched with the adult structure and function?

    a.      
    mesencephalon – colliculi – visual and auditory reflexes

    b.     
    metencephalon -  medulla -  reflex center

    c.      
    diencephalon – thalamus – sensory relay and integration

    d.     
    telencephalon – cerebellum – motor coordination
    • A, C
    • not B medulla = myelencephalon !! -_-" (shame on me)
  26. Myelination:

    a.      
    is accomplished by neurilemma or Schwann cells in peripheral nerves

    b.     
    is accomplished by oligodendroglieal cells with in spinal cord

    c.      
    continues after birth

    d.     
    is related to function
    all
  27. Hydrocephalus:

    a.      
    exhibits increased accumulation of the CSF with in the ventricles
    or between the brain and dura mater

    b.     
    is accompanied by an excessive amount of the manoitic fliud

    c.      
    may be caused by and obstruction of the aqueduct of Sylvius

    d.     
    may be caused by an absence of the choroid plexus
    • C,A
    • - also obstruction in aqueduct
  28. Spina bifida cystica and meningoencephalocele:

    a.      
    are often caused by a failure of the neural tube to close

    b.     
    have their inception during the 4th week of the
    development

    c.      
    always occur together in the affected individual

    d. 
    have
    as their primary cause a defect of bone
    • D
    • neural tube defects : rachischisis or anencephaly --> failure of neural tube to close during 4th week
  29. Meningoencephalocele:

    a.      
    is due to the failure of the neural tube to close

    b.     
    is often associated with displacement og the medulla and some
    cerebellum into the vertebral canal

    c.      
    is most frequently located in the cervical cord region

    d.
    is  related to hydrocephaly
    B, D
  30. Anencephaly:

    a.      
    is the result of the cephalic part of the neural tube to form

    b.     
    has its inception during the 5th week of development

    c.      
    is seen more frequently in females than in males

    is
    accompanied by a deficiency in amniotic fliud
    • C
    • - is seen when neural tube ind the cephalic part fails to close
  31. . Congenital absence of the neural crest cells result in:

    a.      
    absence of sympathetic chain ganglia

    b.     
    facial malformations

    c.      
    absence of adrenal cortex

    d.     
    absence of pigment cells
    A, B, D
  32. Which of the following is usually associated with ancepahly?

    a.      
    microcephalus

    b.     
    hydrocephalus

    c.      
    cranioschisis

    d.     
    microcephalus

    e.      
    conical cranium
    C - means split skull
  33. . The metencephalon forms the:

    a.      
    cerebellum

    b.     
    medulla oblongata

    c.      
    both

    d.     
    neither
    A
  34. The mesencephalon differentiates into the:

    a.      
    cerebellum

    b.     
    pons

    c.      
    both

    d.     
    neither
    D
  35. . The brain flexure which develops between the metencephalon and
    the myelencephalono is called the

    a.      
    pontine

    b.     
    hindbrain

    c.      
    cervical

    d.     
    cephalic

    e.      
    midbrain
    A
  36. The lateral longitudinal groove in the inner surface of the
    developing spinal cord is the:

    a.      
    neural groove

    b.     
    cuneate groove

    c.      
    sulcus limitans

    d.     
    longitudinal groove

    e.      
    transverse fold
    C

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