... the intact rectal complex and into the bath (haemolymph), with K + fluxes approximately twice as large as those of Na + . Analyses of fluxes in larvae with empty guts, found in recently moulted larvae, versus those with full guts highlighted differences in the rates of K + or Na + transport within tubule...

... of hepatocytes from trout ( Oncorhynchus mykiss ) and rat ( Rattus rattus ). Cell volume was studied by video- and fluorescence microscopy,while K + fluxes were assessed by measuring unidirectional 86 Rb + fluxes. In trout and rat hepatocytes, hyposmotic (180 mosmoll -1 )exposure at pH 7.45 caused cell swelling...

..., followed by a drop, closely corresponded to the distal terminus of the constricted region of aesthetascs ( Gleeson et al., 1996 ). This association between maximal flux and the distal border of the constricted region was further supported by measurements of K + flux using a horizontal scanning orientation...

...-induced K + flux, a high concentration of furosemide (10 −3 moll −1 ) is required for full inhibition of this flux; no effect was obtained with bumetanide (10 −4 moll −1 ). Consequently, NEM appears to activate a KCl cotransport similar to the one induced in hypotonically swollen cells. Finally...