“Adrenergic antagonists such as dl-…(-8)-10(-6) M), oxprenolol (10(-8)-10(-6) M), and practolol (10(-6)-…) M) blocked equally the inhibition of alanine and glutamine release, prevented the stimulations of muscle cAMP levels, phosphosphorylase a formation, … depletion of muscle glycogen produced by either epinephrine or serotonin.”