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State whether the following is true or false.
Signalling through ligand-gated ion channels is faster than signalling through G protein-coupled receptors.

  • A.True only at large scales
  • B.False only at small scales
  • C.True
  • D.False

Answer: C

The channel opens directly on binding, whereas a G protein pathway involves several intermediate steps. Speed is traded against the amplification that the longer route provides. Each design suits a different kind of message.

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