Copyright and Intellectual Property
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What is the direction of electrical impulse propagation along the axon?

  • Lateral direction
  • Bidirectional
  • Anterograde direction (correct)
  • Retrograde direction
  • Why can the electrical impulse only propagate in an anterograde direction?

  • Because the entire axon is depolarized
  • Because the axon is not depolarized
  • Because the upstream region is depolarized and refractory (correct)
  • Because the downstream region is depolarized
  • What is the state of the upstream region of the membrane?

  • Polarized
  • Depolarized and refractory (correct)
  • Hyperpolarized
  • Hypopolarized
  • What is the consequence of the upstream region being depolarized and refractory?

    <p>The electrical impulse can propagate only in an anterograde direction (B)</p> Signup and view all the answers

    Which figure illustrates the direction of electrical impulse propagation along the axon?

    <p>Fig. 20.4A (D)</p> Signup and view all the answers

    What is the primary characteristic of small, unmyelinated neurons in terms of their resistance?

    <p>High resistance (C)</p> Signup and view all the answers

    What is the relationship between the distance along the axon and the decremental decay?

    <p>Inversely proportional (C)</p> Signup and view all the answers

    What is the significance of the λ value in the context of neuronal signaling?

    <p>It is the length constant of the axon (C)</p> Signup and view all the answers

    What is the primary difference between small, unmyelinated neurons and large-diameter neurons?

    <p>Myelination of the neuron (C)</p> Signup and view all the answers

    What is the term for the decrease in signal strength as it travels along the axon?

    <p>Decremental decay (D)</p> Signup and view all the answers

    What is the main topic of the research article mentioned?

    <p>Action of local anesthetics on the nervous system (D)</p> Signup and view all the answers

    What is the title of the journal where the article was published?

    <p>Journal of General Physiology (C)</p> Signup and view all the answers

    Who are the authors of the research article?

    <p>Ritchie JM and Greengard P (B)</p> Signup and view all the answers

    What is the year the article was published?

    <p>1977 (B)</p> Signup and view all the answers

    What is the specific location affected by local anesthetics in the research article?

    <p>Node of Ranvier (A)</p> Signup and view all the answers

    What is the primary reason lipid emulsion should be available during certain medical procedures?

    <p>To counteract potential toxicity from large doses of local anesthetics (A)</p> Signup and view all the answers

    In what types of medical procedures should lipid emulsion be available?

    <p>Placement of peripheral nerve and neuraxial blocks (C)</p> Signup and view all the answers

    What is the primary benefit of having lipid emulsion available during the administration of local anesthetics?

    <p>It provides a treatment option for local anesthetic toxicity (D)</p> Signup and view all the answers

    Why is it important to have lipid emulsion available during certain medical procedures involving local anesthetics?

    <p>To mitigate potential toxicity from large doses of local anesthetics (A)</p> Signup and view all the answers

    What is the main indication for having lipid emulsion available during the administration of local anesthetics?

    <p>To counteract potential toxicity from large doses of local anesthetics (B)</p> Signup and view all the answers

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