Mastering Ion Channels and Membrane Potentials
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Questions and Answers

Which of the following is true about ion channels?

  • They contribute to the resting membrane potential
  • They are formed by 2-3 membrane spanning protein molecules
  • They determine the diameter of the pore (correct)
  • They are always open

    • What is the property of ion channels to open and close depending on changes in the cell membrane called?

  • Hyperpolarization
  • Depolarization
  • Diffusion
  • Gating (correct)

    • What are the functional states of ion channels?

  • Open and activatable, closed and non-activatable, open and non-activatable
  • Closed and activatable, open and activatable, closed and non-activatable (correct)
  • Closed and activatable, open and non-activatable, closed and non-activatable
  • Open and non-activatable, closed and activatable, closed and non-activatable

    • What determines the resting membrane potential?

    <p>Non-gated ion channels</p> Signup and view all the answers

    What is the typical value of the resting membrane potential?

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

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