Chapter 13 A&P

25 July 2022
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question
The hyperalgesia that is common in phantom limb pain could be blocked if a new drug was developed that could prevent (without triggering any side-effects) the ______.
answer
diffusion of calcium ions through NMDA receptors
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The first level of neural integration in the somatosensory system is the __________ level.
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receptor
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__________ do NOT exhibit the property of adaptation.
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tonic receptors
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Why might an individual experience the phenomenon known as "referred pain"?
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Visceral pain afferents travel along the same pathways as somatic pain fibers.
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Which structure is involved in the segmental level of motor control?
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spinal cord
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Choose the FALSE statement about nerves.
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The majority of a nerve's bulk is due to axons
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CNS nerve fibers lack the intrinsic capacity to regenerate, while PNS nerve fibers are able to regenerate.
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true
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Which of the following cranial nerves carries only sensory information?
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olfactory
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Which cranial nerve transmits information about our sense of equilibrium?
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vestibulocochlear
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The majority of the cranial nerves attach to the __________.
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brain stem
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Hiccups could occur if there was irritation or damage to the ______.
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motor branches of ventral rami associated with the C3-C5 region of the spinal cord
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In carpal tunnel syndrome, there may be tingling and numbness in the thumb due to compression of the ______.
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cutaneous branches of the median nerve
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Damage to the ulnar nerve could result in the inability to ______.
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flex the wrist
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If "wrist drop" were to appear, there would also be an increased probability of ______.
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inability to extend the forearm
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A herniated lumbar disc could interfere with ______.
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skin sensations from the lateral thigh skin sensations from the medial thigh adduction of the thigh
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Sciatica has no direct affect on ______.
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control of the adductor longus
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What type of nerve fibers are found in the ventral ramus of a spinal nerve?
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both sensory and motor
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The primary nerve that controls breathing is found in which nerve plexus?
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cervical
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Spinal nerves are all classified as __________.
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mixed nerves
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The phrenic nerve serves the __________.
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diaphragm
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In carpal tunnel syndrome, the __________ is compressed.
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median nerve
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The thickest and longest nerve in the body is the __________.
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sciatic nerve
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What parts of the brain ultimately plan and coordinate complex motor activities?
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cerebellum and basal nuclei
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Somatic reflexes activate __________.
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skeletal muscle
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A knee-jerk reflex that is unusually strong may be caused by ______.
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transmission of excitatory signals from the brain to the neurons that form the femoral nerve
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Which reflex is important for maintaining muscle tone?
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stretch reflex
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Which reflex is triggered when a stranger suddenly grasps your arm?
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crossed-extensor
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The knee-jerk reflex is an example of a __________.
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stretch reflex
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Which of the following does NOT occur as people age?
answer
peripheral nerves die off