CNS Protection and Structure Quiz

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Questions and Answers

What encases the brain to protect it from injury?

  • Cerebrospinal fluid
  • Cranium (correct)
  • Vertebral column
  • Meninges

What limits the access of blood borne materials into the brain tissue?

  • Meninges
  • Cerebrospinal fluid
  • Highly selective blood brain barrier (correct)
  • Ventricles of the brain

Where is cerebrospinal fluid present in the nervous system?

  • Cerebral cavity, meminges, subarachnoid space around the brain
  • Ventricles of the brain, cisterns around the outside of the brain, subarachnoid space around both the brain and spinal cord (correct)
  • Meninges, vertebral column, cerebral cavity
  • Cranium, ventricles of the brain, spinal cord

What is the total capacity of the cerebral cavity enclosing the brain and spinal cord?

<p>1600 to 1700 milliliters (C)</p> Signup and view all the answers

How is the pressure of cerebrospinal fluid maintained?

<p>All chambers connected with one another maintain constant pressure (D)</p> Signup and view all the answers

Flashcards

What protects the brain?

The cranium encases the brain, providing a protective shield against physical trauma and injury.

Blood-brain barrier

The blood-brain barrier is a highly selective barrier that restricts the passage of blood-borne substances into brain tissue.

Where is CSF found?

Cerebrospinal fluid is present in the ventricles of the brain, cisterns around the outside of the brain, and the subarachnoid space around both the brain and spinal cord.

Cerebral cavity capacity

The cerebral cavity has a total capacity of 1600 to 1700 milliliters, enclosing the brain and spinal cord.

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CSF pressure regulation

The interconnected chambers maintain a constant pressure of cerebrospinal fluid.

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Study Notes

Brain Protection and Cerebrospinal Fluid

  • The brain is encased in the cranium, which protects it from injury.
  • The blood-brain barrier limits the access of blood-borne materials into the brain tissue.
  • Cerebrospinal fluid (CSF) is present in the nervous system, specifically in the cerebral ventricles, subarachnoid space, and central canal of the spinal cord.
  • The total capacity of the cerebral cavity enclosing the brain and spinal cord is approximately 150 mL.
  • The pressure of cerebrospinal fluid is maintained by a delicate balance between its production and absorption, with an average pressure of 10-15 mmHg.

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