Ion Channel Gating Mechanisms Quiz
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Questions and Answers

Which type of gating responds to changes in membrane electric potential, with a typical example being Na+ channels?

  • Ligand gating
  • Voltage gating (correct)
  • Channel gating
  • Facilitated diffusion
  • What type of gating opens or closes when bound to an external ligand, such as a hormone, or an internal ligand, such as intracellular Ca++, cAMP, or G-protein?

  • Ligand gating (correct)
  • Channel gating
  • Facilitated diffusion
  • Voltage gating
  • Which mechanism involves the passive transport of large molecules like glucose and amino acids, with the help of a carrier protein?

  • Voltage gating
  • Channel gating
  • Ligand gating
  • Facilitated diffusion (correct)
  • In facilitated diffusion, the carrier protein has a channel that is large enough to transport a specific molecule part-way but not all the way through the membrane. What happens to the molecule once it enters the channel?

    <p>It becomes bound to a specific receptor on the protein carrier</p> Signup and view all the answers

    Which type of diffusion occurs with the concentration gradient and requires a carrier protein to facilitate the transport of specific molecules?

    <p>Facilitated diffusion</p> Signup and view all the answers

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