Neurophysiology and Neurochemistry Quiz
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Neurophysiology and Neurochemistry Quiz

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@VisionaryDiscernment

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Questions and Answers

Which type of cells are responsible for supporting and maintaining neural structure?

  • Myelinated neurons
  • Oligodendrocytes (correct)
  • Axon hillocks
  • Glial cells

    • What is the main way that neurons communicate with each other?

  • Gap junctions
  • Axon terminals
  • Electrical communication
  • Chemical synapses (correct)

    • Which type of potential is a small positive change in potential?

  • Inhibitory postsynaptic potential (IPSP)
  • Action potential
  • Excitatory postsynaptic potential (EPSP) (correct)
  • Postsynaptic potential

    • What is the function of myelin in neurons?

    <p>To protect and speed up electrical signals</p> Signup and view all the answers

    What occurs when the action potential reaches the presynaptic boton?

    <p>Calcium channels open up</p> Signup and view all the answers

    Which type of summation involves multiple inputs from several neurons?

    <p>Spatial summation</p> Signup and view all the answers

    What occurs when a sufficient IPSP is present?

    <p>The likelihood of generating an action potential is reduced</p> Signup and view all the answers

    What happens to unbound neurotransmitters in the synapse?

    <p>They are cleared through endocytosis</p> Signup and view all the answers

    Which of the following statements accurately describes the resting membrane potential?

    <p>The resting membrane potential is the result of a difference in electrical charge across the membrane.</p> Signup and view all the answers

    Which of the following accurately describes the action potential?

    <p>The action potential is the result of the opening of sodium channels and the influx of positive ions.</p> Signup and view all the answers

    What is the function of the myelin sheath?

    <p>The myelin sheath insulates the axon, allowing for faster propagation of the action potential.</p> Signup and view all the answers

    What are the nodes of Ranvier?

    <p>The nodes of Ranvier are gaps in the myelin sheath where the action potential is regenerated.</p> Signup and view all the answers

    What is the role of refractory periods in neuronal firing?

    <p>Refractory periods prevent neurons from firing constantly.</p> Signup and view all the answers

    What causes multiple sclerosis?

    <p>Multiple sclerosis is caused by the degradation of oligodendrocytes by the immune system.</p> Signup and view all the answers

    What is saltatory conduction?

    <p>Saltatory conduction is the process of action potential propagation along the axon by jumping between nodes of Ranvier.</p> Signup and view all the answers

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