X.Liu PSYC5130 Establishing the Membrane Potential Quiz
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Questions and Answers

What is the main function of oligodendrocytes in the central nervous system?

  • Form myelin around axons (correct)
  • Strengthen the blood-brain barrier
  • Regulate chemicals in synapses
  • Produce extracellular fluid
  • What did Paul Ehrlich's experiment over 100 years ago demonstrate?

  • The function of oligodendrocytes in the nervous system
  • The existence of the blood-brain barrier (correct)
  • The production of extracellular fluid in the brain
  • The role of astrocytes in synapse regulation
  • Which cells produce the blood-brain barrier in the brain's capillaries?

  • Ependymal cells
  • Astrocytes (correct)
  • Oligodendrocytes
  • Neurons
  • In which region is the blood-brain barrier weak, allowing for detection of toxic substances entering the blood?

    <p>Area postrema</p> Signup and view all the answers

    How do water molecules typically move through the blood-brain barrier?

    <p>Passively through capillary cells</p> Signup and view all the answers

    What effect do astrocytes have on substances entering the brain from the capillaries?

    <p>Regulate them closely</p> Signup and view all the answers

    What role do oligodendrocytes play in relation to axons?

    <p>Form myelin around them</p> Signup and view all the answers

    Where are larger gaps between capillary cells found, allowing greater movement of substances in and out of tissues?

    <p>Peripheral tissues</p> Signup and view all the answers

    What substance requires energy to move between tightly packed cells of capillaries in the brain?

    <p>Other molecules</p> Signup and view all the answers

    Which of these cell types forms segments of myelin for several adjacent axons?

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

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