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Effect of 100 μM guanethidine and 100 μM hexamethonium on EFS- (1–8 Hz, pulse width 1 msec, 9 V and duration 10 s (A) and NO- (B) induced relaxations of longitudinal muscle strips of rat gastric fundus. The experiments were performed during a 0.1 μM 5-HT-induced contraction in the presence of 1 μM atropine. Results are shown as the means±s.e.mean and are expressed as percentage of decrease of the 5-HT-induced contraction for n=5.
