CH 12 Quiz – Flashcards

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1) The dorsal root ganglia mainly contain
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cell bodies of sensory neurons
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) Enlargements of the spinal cord occur
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in those spina; segments that control limbs
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) The ________ is a strand of fibrous tissue that provides longitudinal support as a component of the coccygeal ligament.
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filum terminale
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) Spinal nerves are
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both sensory and motor
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) Which of the following associations is incorrect? A) 8 cervical spinal nerves B) 11 thoracic spinal nerves C) 5 lumbar spinal nerves D) 5 sacral spinal nerves E) 1 coccygeal spinal nerve Answer: B
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B
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) In an adult, the conus medullaris is found at about
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L1
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) The tough, fibrous, outermost covering of the spinal cord is the
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Dura Mater
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) The layer of the meninges in direct contact with the spinal cord is the
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choroid plexus
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Cerebrospinal fluid flows within the
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subarachnoid space
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) The epidural space contains
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denticulate ligaments
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) The outward projections from the central gray matter of the spinal cord are called
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horns
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) Axons crossing from one side of the spinal cord to the other within the gray matter are found in the
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white commissures
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The white matter of the spinal cord is mainly
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mylinated axons
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In the spinal cord, white matter is separated into ascending and descending tracts organized as
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columns
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Bill contracts a viral disease that destroys cells in the posterior gray horns in his spinal cord. As a result, which of the following would you expect?
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loss of sensation to torso
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Mary is in an automobile accident and suffers a spinal cord injury. She has lost feeling in her lower body. Her doctor tells her that swelling is compressing a portion of her spinal cord. Which part of her cord is likely to be compressed?
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ascending tracts
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) The outermost connective-tissue covering of nerves is the
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epimysium
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The layer of connective tissue that surrounds a fascicle within a peripheral nerve is the
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perineurium.
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) In the condition ________, a virus infects dorsal root ganglia, causing a painful rash whose distribution corresponds to that of the affected sensory nerves as seen in their dermatomes.
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shingles
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Which of the following is not true about a positive Babinski reflex?
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causes you to close your eyes when you sneeze
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