Impulse Transmission in Nerve Fibers Quiz
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Questions and Answers

What type of synapse is described as fast, two-way conductive, and hard to influence impulse transmission?

  • Chemical synapse
  • Electrical synapse (correct)
  • Excitatory synapse
  • Inhibitory synapse
  • Which neurotransmitter is involved in the removal process from the synaptic cleft through reuptake in the presynaptic terminal?

  • Norepinephrine (correct)
  • Histamine
  • Epinephrine
  • Dopamine
  • What is the main enzyme responsible for the destruction of acetylcholine in the synaptic cleft?

  • Epinephrine dehydrogenase
  • Acetylcholine kinase
  • Acetylcholinesterase (correct)
  • Dopamine oxidase
  • Which of the following is classified as an amino acid derivative neurotransmitter?

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

    What is the term for the electrical event that occurs at an excitatory synapse?

    <p>EPSP - excitatory postsynaptic potential</p> Signup and view all the answers

    Which of the following polypeptides acts as a neurotransmitter according to the text?

    <p>VIP - vasoactive intestinal peptide</p> Signup and view all the answers

    What is the classification of nerve fibers based on the direction of impulse conduction?

    <p>Aferent and eferent</p> Signup and view all the answers

    Which type of nerve fibers conduct impulses at a speed of 120 m/s?

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

    How is impulse conduction primarily carried out in myelinated fibers?

    <p>Saltatory conduction</p> Signup and view all the answers

    Which factor does NOT determine the velocity of impulse conduction in nerve fibers?

    <p>Time constant</p> Signup and view all the answers

    Which classification system categorizes nerve fibers based on sensory input sources?

    <p>Lloyd-Hunt</p> Signup and view all the answers

    What type of nerve fibers are aferent nerve fibers from muscle spindle classified as in the sensory nerve fiber classification?

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

    Which neurotransmitter is involved in impulse transmission at the nerve-muscle synapse?

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

    What receptor type is the target of Acetylcholine at the nerve-muscle synapse?

    <p>Nicotinic cholinoreceptor</p> Signup and view all the answers

    What enzyme is responsible for destroying neurotransmitter in the synaptic cleft at the nerve-muscle synapse?

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

    Which ion diffuses through the postsynaptic membrane into the skeletal muscle fiber during impulse transmission at the nerve-muscle synapse?

    <p>Sodium (Na+)</p> Signup and view all the answers

    Which enzyme inhibitors are used to enhance N-cholinoreceptor stimulation at the nerve-muscle synapse?

    <p>Acetylcholinesterase inhibitors</p> Signup and view all the answers

    Which type of myorelaxants block the N-cholinoreceptors at the nerve-muscle synapse?

    <p>Competitive myorelaxants</p> Signup and view all the answers

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