Mastering Action Potential and Synaptic Transmission
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Questions and Answers

Which step in the excitation-contraction-relaxation cycle involves the opening of voltage-gated Ca2+ channels?

  • Binding of acetylcholine to nicotinic receptors
  • Depolarization of the plasma membrane (correct)
  • Continuous influx of Na2+
  • Action potential traveling along the axon

    • What is the role of acetylcholine in the excitation-contraction-relaxation cycle?

  • Creating the action potential
  • Binding to nicotinic receptors (correct)
  • Generating the end plate potential
  • Causing the opening of voltage-gated Ca2+ channels

    • What is the effect of the continuous influx of Na2+ in the excitation-contraction-relaxation cycle?

  • Depolarization of the plasma membrane
  • Creation of the end plate potential (correct)
  • Opening of voltage-gated Ca2+ channels
  • Binding of acetylcholine to nicotinic receptors

    • What is the purpose of the excitation step in the excitation-contraction-relaxation cycle?

    <p>Transfer of action potential from a motor neuron to the sarcolemma</p> Signup and view all the answers

    What triggers the creation of an action potential in the excitation-contraction-relaxation cycle?

    <p>Depolarization of the plasma membrane</p> Signup and view all the answers

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