in order to study the regulation of beta-adrenergic receptor number and function in response to prolonged physical effort , lymphocytic beta-adrenoceptor density ( determined by ( - ) [ 125i ] iodocyanopindolol binding ) , lymphocytic basal and isoproterenol-stimulated cyclic amp ( camp ) production and concentrations of plasma catecholamines were measured before and during 3 h running exercise in eight healthy volunteers .
C0022245
isoproterenol
C0007412
catecholamines