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BIO121 Chapter 14 Spinal Cord

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  • What is the longest and thickest nerve in the body?
    sciatic
  • The brain relay of information is through the
    thalamus
  • Sensory information is processed in the __________ lobe.
    parietal
  • How many cervical nerves are there?
    8
  • What are bundles of nerves from a region of the spinal cord called?
    nerve plexus
  • A ________ initiates sensory information.
    stimulus
  • Sensory information enters the CNS through the ________ root.
    dorsal, posterior
  • Efferent information leaves the spinal cord through the _________ side.
    ventral, anterior
  • What is the bottom of the spinal cord called?
    conus medullaris
  • The majority of neurons are
    interneurons.
  • What are motor neurons from the CNS to the effector called?
    lower motor neurons
  • The butterfly shape inside the spinal cord is ________ matter.
    grey
  • The process of removing CSF from the body is done by
    lumbar puncture, spinal tap.
  • Approximately how long is the spinal cord?
    16-18 inches
  • What plexus do the femoral and obturator nerve emerge from?
    lumbar
  • The layer of connective tissue surrounding mixed nerves is
    epineurium.
  • White matter in the spinal cord is known as
    tracts.
  • Muscles and glands are examples of
    effectors.
  • What are the nerves that exit the base of the spinal cord known as?
    filum terminale
  • How many sensory neurons are involved in sensation?
    3
  • How many sacral nerves are there?
    5
  • What are sensory tracts in the spinal cord also known as?
    ascending
  • What types of information do descending tracts in the spinal cord carry?
    motor, output
  • What are clusters of cell bodies in the PNS known as?
    ganglia
  • The mapped regions of the tissue and skin serviced by spinal nerves is known as the
    dermatome.
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