What would interfere with the actions of epinephrine through

What would interfere with the actions of epinephrine through a G-protein coupled receptor? A molecule that prevents epinephrine from entering the nucleus A molecule that interferes with formation of receptor dimmers A different molecule that binds to the G protein coupled receptor An enzyme in the cell that cleaves epinephrine, making it inactive0

Solution

The correct answer is “A different molecule that bins to the G-protein coupled receptor.”

Antagonists are the molecules that bind to the same receptor that a ligand binds and blocks or dampens the responses. Such antagonists are generally used in treatment of conditions which involve the signaling pathway mediated by the receptor. Drugs like propanalol and methoxamine are antagonists of epinephrine.