 relative to bilateral 0 Na^+^ and are expressed as the mean ± SEM of *n*, where *n* = number of ROIs within the taste bud. (B) A polarized epithelial preparation was initially perfused on both sides with 0 Na^+^ Ringer\'s solution containing 000 mM NMDG-Cl (pH 0.0). Temporal changes in F~000~ of Na-green--loaded TRCs were monitored while the apical membrane was perfused with Ringer\'s solution containing 000 mM NaCl + 0 μM Bz + ETH at 00% 