Which second messenger is stimulated by epinephrine binding to a β-adrenergic receptor?
A)Calcium
B)Inositol triphosphate (IP3)
C)Diacylglycerol (DAG)
D)Cyclic adenosine monophosphate (cAMP)

Question

Quizplus · Accepted Answer

Second-messenger molecules are the initial link between the first signal (hormone) and the inside of the cell (Table 20-4). For example, binding of epinephrine to a β-adrenergic-receptor subtype activates (through a stimulatory G protein [G s]) the enzyme adenylyl cyclase. Adenylyl cyclase catalyzes the conversion of adenosine triphosphate (ATP) to the second messenger, 3', and 5'-cAMP.

Which Second Messenger Is Stimulated by Epinephrine Binding to a β-Adrenergic