Fig. 7. No variable of the action potential (AP) activity correlated with
octopamine-dependent modulation of the transepithelial potential (TEP). (A)
Haemolymph Ringer (control) injection only slightly reduced and phase-shifted
the TEP oscillation for less than 20 min, while injection of 150 nmol of
octopamine caused a long-term depression of TEP oscillations. Flight activity
marked the beginning of a non-oscillatory interval. The frequency of both
action potential classes was unaffected by control or octopamine injections.
(B) None of the evaluated variables of the action potential activity was
affected by the injections. The first bin after the control injection (filled
circle) is only 5.2 min long.
