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Microbiology Study Guide: Virus and Ion Channels

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  • What is the function of K⁺ leak channels?

    K⁺ leak channels allow potassium ions to pass and help maintain the resting membrane potential.

  • How do ligand-gated channels operate?

    Ligand-gated channels open when a specific chemical binds to them, allowing ions to pass through.

  • What happens when voltage-gated Na⁺ channels open?

    Voltage-gated Na⁺ channels open to allow Na⁺ ions to enter the cell, causing depolarization.

  • What is the role of voltage-gated K⁺ channels?

    Voltage-gated K⁺ channels open to let K⁺ ions exit the cell, leading to repolarization of the membrane.

  • What triggers voltage-gated Ca²⁺ channels and their effect?

    Voltage-gated Ca²⁺ channels open to allow Ca²⁺ ions to enter, which triggers the release of neurotransmitters.