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Presynaptic Neurotransmission Quiz
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Presynaptic Neurotransmission Quiz

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Questions and Answers

What is the main role of the presynaptic cell in neurotransmission?

  • Generating an electrical signal for transmission
  • Receiving chemical signals from other neurons
  • Converting the action potential into a chemical signal (correct)
  • Amplifying the action potential

    • Where does the transformation from electrical to chemical signal take place in the presynaptic cell?

  • Dendrites
  • Cell body
  • Synaptic cleft
  • Axon terminal (correct)

    • How is neurotransmission often described due to the transformation from electrical to chemical signal?

  • Purely electrical
  • Mechanical in nature
  • Biological in nature
  • Electrochemical in nature (correct)

    • What type of ion channels are crucial in initiating the release of neurotransmitters at the axon terminal?

    <p>Voltage-gated calcium channels</p> Signup and view all the answers

    What is the main role of calcium ions at the axon terminal?

    <p>Initiating the release of neurotransmitters</p> Signup and view all the answers

    What is the ionic charge of calcium ions that enter the cell through voltage-gated calcium channels?

    <p>2+</p> Signup and view all the answers

    What is the chemical gradient that drives calcium ions into the cell at the axon terminal?

    <p>Calcium being much more highly concentrated outside the cell</p> Signup and view all the answers

    What is the function of neurotransmitters released at the axon terminal?

    <p>Carrying the signal across the synaptic cleft to the postsynaptic neuron</p> Signup and view all the answers

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