Introduction to Signal Transduction

AP Biology· difficulty 2/5

Ligand-gated ion channels respond to ligand binding by

  • A

    Opening or closing to permit ion flow

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  • B

    Releasing transcription factors

  • C

    Activating second messengers

  • D

    Phosphorylating relay proteins

Explanation

Ligand binding causes a conformational change that opens (or closes) the channel, altering ion flow and membrane potential.

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