Figure 1.
Effect of α-chymotrypsin on EFS-induced relaxation of longitudinal muscle in the jejunum of Wistar rats. When repetitive EFS at 10 Hz for 10 s led to reproducible relaxation, jejunal segments were treated with α-chymotrypsin (3 U ml−1) for 20 min. The relaxation after the treatment was compared to the control relaxation immediately before the treatment. The continuous line indicates the presence of α-chymotrypsin in the bathing fluid. After recording normal spontaneous movements, the chart was run at a fast speed immediately before the stimulation to make the relaxant response clear. Black bold lines indicate the duration of EFS for 10 s.