Fig. 5.

Mean ± SE percent correct responses on trials with 0.05 m (left), 0.1 m(middle), and 0.2 m (right) NaCl. Open circles, Control session without amiloride immediately preceding the amiloride sessions. Closed circles, Amiloride session at the indicated concentration. A logistic function (see equation in Materials and Methods) was fit (least squares) to the data from amiloride sessions for 0.05 and 0.2m. The asymptote was set to the mean for the control sessions shown (0.05 m: b = 0.80,c = 2.32 μm, d = 10.78%; 0.2 m: b = 1.73,c = 8.55 μm, d = 36.35%). A curve could not be reliably fit to the data for the 0.1m concentration.