in the present study the control of the 5-ht content in ec was studied by a cytofluorimetric method in specimens from rat duodenal mucosa after drug incubations and transmural field stimulation ( tfs ) in vitro : incubations in a krebs ' solution containing adrenaline ( a ) , noradrenaline ( na ) or isoprenaline ( ip ) ( 10 ( -9 ) -- 10 ( -5 ) m ) caused a decrease of the 5-ht content in ec .
C0014563
adrenaline
C0028351
noradrenaline