An adipose (fat)cell responds to the presence of the hormone epinephrine by increasing cytosolic cyclic AMP production,which leads to the catabolism of both glycogen and fat.What is the most likely explanation for this phenomenon?
A)Epinephrine is binding to two types of receptors in the plasma membrane.
B)The activated receptor complex stimulates production of two different second messengers.
C)Cyclic AMP directly activates enzymes that catabolize glycogen and fat.
D)Cyclic AMP-dependent protein kinase activates two kinds of enzymes.

Question

Quizplus · Accepted Answer

Cyclic AMP-dependent protein kinase (PKA) is activated by cyclic AMP and can phosphorylate different target enzymes involved in the catabolism of glycogen and fat, thus explaining how one second messenger can lead to the activation of multiple pathways.

An Adipose (Fat)cell Responds to the Presence of the Hormone