Epinephrine acts as a signal molecules that attaches to ____ proteins.
1. ion-channel receptor
2. nuclear receptor
3. G-protein-linked receptor
4. receptor tyrosine kinase
5. intracellular receptor

Epinephrine acts via G-protein-linked receptors. The heterotrimeric G proteins located within the cell are activated by G protein-coupled receptors that span the cell membrane. Signaling molecules bind to a domain on the GPCR located outside the cell, and an intracellular GPCR domain then in turn activates a particular G protein.

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Epinephrine acts as a signal molecules that attaches to ____ proteins. 1. ion-channel receptor 2. nuclear receptor 3. G-protein-linked receptor 4. receptor tyrosine kinase 5. intracellular receptor

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Epinephrine acts as a signal molecules that attaches to ____ proteins.
1. ion-channel receptor
2. nuclear receptor
3. G-protein-linked receptor
4. receptor tyrosine kinase
5. intracellular receptor