When Different Transmitters or Hormones Act Through Different G Protein-Coupled

question 53

Multiple Choice

When different transmitters or hormones act through different G protein-coupled metabotropic receptors,

• A) each receptor is always coupled to a different type of G protein.
• B) multiple receptors can be coupled to the same type of G protein.
• C) the G protein that is coupled to the receptor is determined by the transmitter or hormone that is the ligand for that receptor.
• D) the second messenger cascade that is coupled to the receptor is determined by the transmitter or hormone that is the ligand for that receptor.
• E) the second messenger cascade that is coupled to the receptor is always determined by the specific G protein type that is coupled to that receptor.

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