Mechanisms mediating cholinergic antral circular smooth muscle contraction in rats

Figure 1 Effect of bethanechol on smooth muscle contraction. Antrum circular smooth muscle strips were incubated with increasing concentrations of bethanechol (10^-4 mol/L to 10^-7 mol/L). The vertical axis represents the developed tension (in grams per mm²). Bethanechol significantly increased circular muscle tension (P < 0.05; paired t-test). Each data point represents mean ± SE, n = 4.