Depolarization of Nerve Impulses Quiz
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Questions and Answers

Which of the following best describes depolarization of a nerve impulse?

  • The change in the electrical potential across a neuron's cell membrane (correct)
  • The resting membrane potential of a neuron
  • The communication between neurons through electrical impulses
  • The opening of ion channels in response to a stimulus

    • What is the resting membrane potential of a neuron?

  • The sequence of events involved in an action potential
  • The activity of ion channels and ion pumps
  • The difference in electrical charge across the cell membrane
  • The inside of the neuron being negatively charged relative to the outside (correct)

    • What happens when a neuron is stimulated?

  • The neuron stops communicating with other cells
  • The resting membrane potential increases
  • Ion channels in the cell membrane open in response to the stimulus (correct)
  • The neuron becomes more negatively charged

    • What are action potentials?

    <p>Electrical impulses involved in neuron communication</p> Signup and view all the answers

    How is the resting membrane potential of a neuron maintained?

    <p>By the activity of ion channels and ion pumps</p> Signup and view all the answers

    Which ions are involved in depolarization of a nerve impulse?

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

    What is the typical resting membrane potential of a neuron?

    <p>-70 millivolts</p> Signup and view all the answers

    What is the role of ion channels during depolarization?

    <p>Ion channels allow specific ions to enter the neuron</p> Signup and view all the answers

    What triggers depolarization of a nerve impulse?

    <p>The opening of ion channels in the cell membrane</p> Signup and view all the answers

    What is the purpose of depolarization in the sequence of events during an action potential?

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

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