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10 Questions

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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%

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?

Anastomotic arteries Signup and view all the answers

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

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

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

Internal jugular vein Signup and view all the answers

What primarily governs vasomotor activity in the brain?

Metabolic requirements of the brain cells Signup and view all the answers

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

It has little effect on cerebral blood flow Signup and view all the answers

What is the effect of hyperventilation on cerebral blood flow?

It produces cerebral vasoconstriction Signup and view all the answers

What is the Monro-Kellie doctrine related to?

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