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Figure 2


Fig. 2. Stage-dependent changes in fictive lung burst frequency during noradrenaline (NA) application at different concentration. NA application was followed by a 30-90 min wash-out period. (A) Absolute lung burst frequency, (B) data expressed as a percentage change from baseline values. In A and B, responses were measured in pre-(triangles; N=12) and metamorphic tadpoles (squares; N=10), and adult frogs (circles; N=9). Values are expressed as means ± s.e.m. *Values statistically different from baseline at P<0.05. {dagger}Values statistically different from corresponding pre-metamorphic value at P<0.05.