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Fig. 2. (A) Example of excitatory junctional potentials (EJPs) recorded from
musculature of active anterior foreguts in response to a 10 ms stimulation of
the severed recurrent nerve. Following exposure to the active hemolymph factor
the amplitude of the EJP dropped significantly but recovered after a saline
rinse. (B) We found a significant decrease in the average amplitude of the
EJPs recorded from anterior esophageal constrictor muscles of the anterior
foreguts (N=10; paired t-test, P<0.001). The
average EJP amplitude returned to the initial saline level in the rinse.
*Significant difference from both saline and rinse levels.