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Brain Circulation and CSF
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Brain Circulation and CSF

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Questions and Answers

What percentage of the body's resting cardiac output does the brain receive?

  • 15% (correct)
  • 20%
  • 5%
  • 10%

    • What is the consequence of interruption of cerebral blood flow for just a few seconds?

  • No noticeable effect
  • Mild headache
  • Dizziness
  • Temporary unconsciousness (correct)

    • Which arteries join to form the basilar artery that then splits to form the two posterior cerebral arteries?

  • Vertebral arteries (correct)
  • Anterior cerebral arteries
  • Middle cerebral arteries
  • Internal carotid arteries

    • Which type of arteries provide collateral circulation in the brain if a distributing artery becomes occluded?

    <p>Anastomotic arteries</p> Signup and view all the answers

    What is the characteristic feature of the blood-brain barrier?

    <p>Prevents the solutes in the lumen of the capillaries from having direct access to the brain extracellular fluid</p> Signup and view all the answers

    Where do nearly all of the venous blood from the brain leave the cranium?

    <p>Internal jugular vein</p> Signup and view all the answers

    What primarily governs vasomotor activity in the brain?

    <p>Metabolic requirements of the brain cells</p> Signup and view all the answers

    How does lowering arterial pH at a constant PCO2 affect cerebral blood flow?

    <p>It has little effect on cerebral blood flow</p> Signup and view all the answers

    What is the effect of hyperventilation on cerebral blood flow?

    <p>It produces cerebral vasoconstriction</p> Signup and view all the answers

    What is the Monro-Kellie doctrine related to?

    <p>Intracranial pressure and its relation to brain, spinal cord, and spinal fluid</p> Signup and view all the answers

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