Smooth Muscle Cells in the Airways Relax While Those in the Blood

Multiple Choice

Smooth muscle cells in the airways relax while those in the blood vessels contract in response to the hormone epinephrine.What would you expect to be different in these two types of cells exposed to epinephrine?

A) Types of proteins expressed
B) Exposure to epinephrine released by neighboring cells
C) Activation of protein kinases
D) Presence of epinephrine receptors
E) Rate of metabolism