FIGURE 6.

Responses to sucrose and mixtures of sucrose and caffeine (A–E) Temporal responses of TII tarsal gustatory sensilla of fifth tarsomere of female S. littoralis to sucrose, caffeine, and mixtures of sucrose and caffeine. N2-Neuron activated with sucrose, N1-Neuron activated with caffeine, while mutual inhibition of both neurons with mixtures of sucrose and caffeine were recorded. (F) Average responses (imp/s) of 18 sensilla of TII when stimulating with 10 mM sucrose, 1.0 mM caffeine, 10 mM caffeine, and mixtures of 10 mM sucrose and 1.0 mM or 10 mM of caffeine. There was a mutual inhibition of both sugar and deterrent responsive GRNs in TII sensilla. Scale bar is 200 ms (n = 7–10). Errors bars represent standard error. Different letters means significant difference (p < 0.05) between responses of N1 or N2 Neurons to the stimuli.