Metabotropic receptors exert their actions by: A. Stabilizing heterotrimeric G-proteins B. G-Beta/Gamma subunits acting as transcription factors C. G-alpha subunits stimulating the production of a second messenger D. Direct interaction with docking proteins E. Stimulating reverse pumping of transmitter from synaptic terminals

Option C.

G - alpha subunits stimulating the production of second messenger

Explanation:

Metabotropic receptor is a type of receptor in the Eukaryotic cells that exerts it's action by producing a second messenger. They do not change channels but they exerts it effect by binding and stimulating G protein to produce a second messenger. They can either close or open channels in cell membrane. They are found at the surface of the cells or vessicles.

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