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viving viving
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6 years ago
A compensatory alteration in the diameter of cerebral blood vessels in response to increased in-tracranial pressure is called:
 
  a. herniation.
  b. vasodilation.
  c. autoregulation.
  d. amyotrophy.
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wrote...
6 years ago
ANS: C
Autoregulation is the compensatory alteration in the diameter of the intracranial blood vessels designed to maintain a constant blood flow during changes in cerebral perfusion pressure. Herni-ation is the downward protrusion of the brainstem. Vasodilation is an enlargement in vessel di-ameter and a part of autoregulation, but the vessels should not dilate in the presence of increased intracranial pressure. Amyotrophy is involved with the anterior horn cells of the spinal cord and not related to autoregulation.
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