Target cells of adrenaline?
Epinephrine is a hormone that works systemically and will activate any and all cells that express a hormone receptor with specificity for epinephrine. 

As stated in the wikipedia article "It plays an important role in the fight-or-flight response by increasing blood flow to muscles, output of the heart, pupil dilation, and blood sugar. Epinephrine does this by its effects on alpha and beta receptors."