Neural Membrane Potential and Action Potentials Quiz
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Questions and Answers

Which ion is responsible for the resting membrane potential (RMP) of -70mV?

  • Ca2+
  • K+ (correct)
  • Na+
  • Cl-
  • At what voltage do voltage-gated channels open?

  • -70mV
  • -40mV (correct)
  • 40mV
  • 0mV
  • What happens when an action potential (AP) arrives at the synaptic terminal?

  • Voltage-gated Na+ channels open
  • Voltage-gated Ca2+ channels close
  • Voltage-gated Ca2+ channels open (correct)
  • Voltage-gated K+ channels open
  • What is the purpose of neurotransmitters (NT) in the synapse?

    <p>To bind to receptors in the postsynaptic membrane</p> Signup and view all the answers

    Which types of receptors are considered classical neurotransmitters?

    <p>Ligand-gated</p> Signup and view all the answers

    What is the main factor that determines the frequency of action potentials (APs)?

    <p>The strength of the stimulus</p> Signup and view all the answers

    Which type of receptor is classified as a ligand-gated receptor?

    <p>Muscarinic receptor</p> Signup and view all the answers

    What is the definition of a classical neurotransmitter?

    <p>A molecule that acts like a neurotransmitter experimentally</p> Signup and view all the answers

    Which type of neurotransmitter acts as a fast-acting neurotransmitter in the central nervous system (CNS)?

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

    What is the main role of voltage-gated calcium (Ca2+) channels in the synaptic terminal?

    <p>To cause vesicle fusion with the presynaptic membrane</p> Signup and view all the answers

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