Second messenger molecules _______________________.
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are included in the cascade of reactions initiated by a metabotropic neurotransmitter; |
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are produced in response to activation of the alpha-subunit of a G protein; |
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are produced in response to an enzyme activated by the alpha-subunit of a G protein; |
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initiate a series of chemical events that open an ion channel; |
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all of the alternatives provided are correct; |
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