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Figure 4


Fig. 4. Dose-dependent changes in fictive buccal burst frequency during noradrenaline (NA) application at different concentrations. NA application was followed by a 30-90 min wash-out period. (A) Absolute buccal burst frequency, (B) frequency data expressed as a percentage change from baseline values. In A and B, data were obtained in pre-(triangles; N=11) and metamorphic tadpoles (squares; N=7), and adult frogs (circles; N=4). Values are expressed as means ± s.e.m. *Values statistically different from baseline at P<0.05.