Final answer:
Stimulation of different adrenergic receptors by epinephrine or norepinephrine leads to various effects in the sympathetic response. For example, stimulation of the α-1 receptor causes vasoconstriction of arteries to the heart, while stimulation of the β-1 receptor leads to heart muscle contraction and smooth muscle relaxation. Understanding the effects of these receptors is important in understanding the sympathetic response.
Step-by-step explanation:
When epinephrine or norepinephrine stimulate the α-1 receptor, it causes vasoconstriction of arteries to the heart (coronary artery) and vasoconstriction of veins. On the other hand, when the α-2 receptor is stimulated, it results in smooth muscle contraction through a decrease in CAMP activity. When β-1 receptor is stimulated by epinephrine or norepinephrine, it increases intracellular CAMP activity and leads to heart muscle contraction, smooth muscle relaxation, and glycogenolysis. Lastly, the stimulation of the β-2 receptor by epinephrine or norepinephrine results in bronchodilation and smooth muscle relaxation.