Blood Brain Barrier Function and Components
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Questions and Answers

What is the main structural component of the Blood Brain Barrier (BBB)?

  • Schwann cells
  • Perivascular astrocytes feet
  • Basement membrane
  • Capillary endothelium with occluding junctions (correct)

    • Which of the following is NOT a function of the Blood Brain Barrier (BBB)?

  • Protect neurons and glia from exogenous substances
  • Regulate passage of molecules and ions from blood to the brain
  • Maintain stable composition of ions in the interstitial fluid
  • Monitor plasma components in the hypothalamus (correct)

    • Which region of the brain does not have the Blood Brain Barrier (BBB)?

  • Cerebellum
  • Choroid plexus (correct)
  • Hypothalamus
  • Posterior pituitary

    • What envelops the basement membrane of capillaries in most Central Nervous System (CNS) regions?

    <p>Perivascular astrocytes feet</p> Signup and view all the answers

    What is the main component of the Peripheral Nervous System (PNS) in terms of nerve structure?

    <p>Nerve fibers (axons)</p> Signup and view all the answers

    What surrounds axons in the peripheral nerves of the Peripheral Nervous System (PNS)?

    <p>Schwann cells</p> Signup and view all the answers

    What is the main function of microglia in the CNS?

    <p>Acting as the major immune defense mechanism</p> Signup and view all the answers

    Which of the following cells do microglia originate from?

    <p>Circulating blood monocytes</p> Signup and view all the answers

    What is the main component of white matter in the central nervous system?

    <p>Myelinated axons</p> Signup and view all the answers

    Where are most synapses found in the central nervous system?

    <p>Gray matter</p> Signup and view all the answers

    Which layer of the cerebellar cortex consists of large neurons called Purkinje cells?

    <p>Outer molecular layer</p> Signup and view all the answers

    What is the primary role of oligodendrocytes in the central nervous system?

    <p>Producing myelin around axons</p> Signup and view all the answers

    What is the functional division of the nervous system responsible for sensory input perceived consciously?

    <p>Somatic sensory division</p> Signup and view all the answers

    Which layer of the embryonic development does the nervous tissue originate from?

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

    Which type of neuron circuit involves two neurons to transmit information?

    <p>Mono-synaptic circuit</p> Signup and view all the answers

    What is the primary function of the motor division of the nervous system?

    <p>Controlling voluntary muscle movements</p> Signup and view all the answers

    Which type of nerve fibers transmit information between the central nervous system and internal organs?

    <p>Efferent fibers</p> Signup and view all the answers

    What is the main role of glial cells in the nervous system?

    <p>Supporting and protecting neurons</p> Signup and view all the answers

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