CSF Absorption and Clinical Conditions
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Questions and Answers

What is the function of cerebrospinal fluid in the CNS?

  • Providing mechanical support for the brain (correct)
  • Producing hormones for brain function
  • Contracting and expanding with brain movements
  • Absorbing nutrients from the blood
  • Which cells lining the ventricles mainly produce cerebrospinal fluid?

  • Astrocytes
  • Oligodendrocytes
  • Ependymal cells (correct)
  • Microglia
  • Increased intracranial pressure can manifest as which of the following symptoms?

  • Papilledema (swelling of the optic disc) (correct)
  • Tinnitus and hearing loss
  • Decreased drowsiness
  • Improved coordination
  • What is the normal range of protein concentration in cerebrospinal fluid?

    <p>50 - 85 mg/100 ml</p> Signup and view all the answers

    Which condition might be indicated by an abnormally low glucose concentration in cerebrospinal fluid?

    <p>Meningitis</p> Signup and view all the answers

    What is the normal range of chloride concentration in cerebrospinal fluid?

    <p>116 - 122 mM</p> Signup and view all the answers

    What is the main site for cerebrospinal fluid (CSF) absorption?

    <p>Arachnoid villi</p> Signup and view all the answers

    Which structure adds more CSF in the 3rd ventricle?

    <p>Choroid plexus</p> Signup and view all the answers

    What occurs at the lateral and median apertures in the 4th ventricle?

    <p>CSF secretion</p> Signup and view all the answers

    Which condition would lead to compression of arachnoid villi tips, preventing blood reflux?

    <p>High CSF pressure</p> Signup and view all the answers

    What happens when the venous pressure exceeds cerebrospinal fluid (CSF) pressure?

    <p>Reflex of blood into subarachnoid space</p> Signup and view all the answers

    Which structure prevents CSF from flowing back into the 3rd ventricle?

    <p>Choroid plexus in 4th ventricle</p> Signup and view all the answers

    What sign is characterized by flexion of the hip at a 90-degree angle followed by pain during extension of the leg?

    <p>Kernig’s Sign</p> Signup and view all the answers

    What is the most common symptom of meningitis?

    <p>Fever</p> Signup and view all the answers

    Where is a lumbar puncture typically performed for cerebrospinal fluid (CSF) analysis?

    <p>Level of L3 - L4</p> Signup and view all the answers

    Which condition could cause an increase in white blood cells (WBC) count in the cerebrospinal fluid?

    <p>Encephalitis</p> Signup and view all the answers

    What is a common sign of increased intracranial pressure?

    <p>Headache</p> Signup and view all the answers

    Which factor would imply a change in vascular permeability when found in the cerebrospinal fluid?

    <p>Increase in WBC count</p> Signup and view all the answers

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