Figure 3.
Tritium efflux from longitudinal muscle preparations of rat ileum preincubated with [3H]noradrenaline. (Abscissa): Time of superfusate collection. (Ordinate): Efflux of tritium per min, expressed as fraction of tissue tritium at the onset of the respective collection period. Electrical field stimulation during S1 and S2 consisted of 480 pulses (20 V cm−1, 0.5 ms) at 8 Hz. Ileal preparations were obtained from rats either in the absence (a) or in the presence (b) of colitis. Each point represents the mean of six experiments ± s.e.m. (vertical bars).