+ Organ Effects Heart Increases heart rate; contractility; conduction across AV node Lungs Increases respiratory rate; bronchodilation Liver Stimulates glycogenolysis Brain Systemic Vasoconstriction and vasodilation Triggers lipolysis Muscle contraction As a hormone,<unk> acts on nearly all body tissues. Its actions vary by tissue type and tissue expression of adrenergic receptors. For example, high levels of<unk> causes smooth muscle relaxation in the airways but causes contraction of the smooth muscle that lines most arterioles.<unk> acts by binding to a variety of adrenergic receptors.<unk> is a nonselective agonist of all adrenergic receptors, including the major subtypes α1, α2, β1, β2, and β3.<unk> s binding to these receptors triggers a number of metabolic changes. Binding to α-adrenergic receptors inhibits insulin secretion by the pancreas, stimulates glycogenolysis in the liver and muscle, and stimulates glycolysis and inhibits insulin-mediated glycogenesis in muscle. β adrenergic receptor binding triggers glucagon secretion in the pancreas, increased adrenocorticotropic hormone (ACTH) secretion by the pituitary gland, and increased lipolysis by adipose tissue. Together, these effects lead to increased blood glucose and fatty acids, providing substrates for energy production within cells throughout the body. In the heart, the coronary arteries have a predominance of β2 receptors, which cause vasodilation of the coronary arteries in the presence of<unk>  Its actions are to increase peripheral resistance via α1 receptor-dependent vasoconstriction and to increase cardiac output via its binding to β1 receptors. The goal of reducing peripheral circulation is to increase coronary and cerebral perfusion pressures and therefore increase oxygen exchange at the cellular level. While<unk> does increase aortic, cerebral, and carotid circulation pressure, it lowers carotid blood flow and end-tidal CO2 or ETCO2 levels. It appears that<unk> may be improving macrocirculation at the expense of the capillary beds where actual perfusion is taking place.
Epinephrine 
Norepinephrine
Norepinephrine 
Ethylnorepinephrine
Dicycloverine
Bromethalin
Hyoscyamine
Adrenaline