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 (C)</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 (C)</p> Signup and view all the answers

Which ions are involved in depolarization of a nerve impulse?

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

What is the typical resting membrane potential of a neuron?

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

What triggers depolarization of a nerve impulse?

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

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