front and rear regions of dog tongue were tested for spatial heterogeneity with respect to monovalent chloride salts ( nacl , kcl , and nh4cl ) and sweet tastants ( sucrose , d-glucose , and l-glucose ) by placing them in ussing chambers where the open-circuit potential , voc , and short-circuit current , isc , were measured .
C0008203
chloride salts
C0037494
nacl