Fig. 5.
Zero-current potential (V0), input resistance (Rin), and membrane capacitance (Cm) of Na/OUT cells during postnatal development. Cells were grouped into five age classes, and measurements of each electrophysiological parameter were averaged within each group.V0 changed significantly during development, becoming more negative (n = 40/43/20/20/35; error bars represent SEM). Rin decreased in older animals, but changes were not significant (n = 41/43/19/18/38). Finally, there was not a significant change inCm and, therefore, in membrane surface area of single vallate taste cells during development (n= 41/44/20/17/37). Asterisks indicate significant differences. PD, Postnatal day.