two different approaches were used : ( a ) isolated acini were incubated in vitro with dextran followed by stimulation with carbamylcholine ( lacrimal ) or isoproterenol ( parotid ) and ( b ) rats were injected with isoproterenol followed by dextran infusion into the parotid duct in vivo .
C0030580
parotid
C0227458
parotid duct