Figure 2.
Effect of NaHS on a) spontaneous and b) bethanechol-stimulated contractile activity. Spontaneous contractile activity measured by area under the contractile curve for 5 minutes was defined as 0%; therefore, negative values represent inhibitory effects on contractile activity. NaHS inhibited spontaneous contractile activity in a dose-dependent manner; *p<0.05 compared to spontaneous contractile activity (ANOVA). Doses of 10-4M and 5×10-4M of NaHS had no effect on contractile activity after pre-contraction.