Fig. 7. ENpa decreases the amplitude of EJPs. (A) Effects of 10^–7 mol l^–1 ENpa. EJPs were evoked by the stimulus train (1 ms, 1.6 V, 10 Hz) for 0.3 s every 20 s. Note ENpa also hyperpolarized the resting potential of the muscle fiber. (B) Comparison of EJPs before (a) and after (b) ENpa application. (C) Inhibitory action of ENpa on EJPs. Histogram shows mean ± S.E. of the maximum amplitude of summated EJPs before and after ENpa application (N=15). Statistical significance was assessed by Student's t-test.