69. Effects of Adrenergics at Receptors Receptor Physiologic Responces Alpha 1 Increases force of heart contraction; vasoconstriction increases BP; mydriasis; salicary glands decrease secretions; bladder and prostate capsule increases contraction and ejaculation Alpha 2 Inhibits the release of norepinephrine; dilates blood vessels; produces hypotension; decreases GI motility and tone Beta 1 Increases heart rate and contraction; increases renin secretion----increase BP Beta 2 Dilates bronchioles; promotomes GI and uterine relaxation; promotes increase in blood sugar through glycogenolysis in the liver; increases blood flow in the skeletal muscles