Each of the following is a second messenger except
A)cyclic adenosine monophosphate.
B)inositol trisphosphate.
C)diacylglycerol.
D)epinephrine.
E)calcium ions.

Question

Quizplus · Accepted Answer

Epinephrine is a hormone and neurotransmitter, not a second messenger. Second messengers are intracellular signaling molecules released by the cell in response to exposure to extracellular signaling molecules. Epinephrine acts as a primary messenger to activate second messenger systems.

Each of the Following Is a Second Messenger Except