Figure 10

Norepinephrine increases the rate of discharge in the presence of Cs⁺. In high [K⁺]_o, Cs⁺ administration was initiated at the downward arrow and continued for the rest of the figure. NE was added to the Cs⁺ solution as indicated above traces b, c and d. Recovery in Cs⁺ solution (no NE) is shown in trace e. Means and SEM are shown in the inset 2 (Control, +cesium, +NE) and 3 (Control, +NE, +cesium). Other explanations are in the text and as in legend of Fig. 1.