Fig. 9.
Comparison of measured blood glucose concentrations with theoretical values calculated for hypothetical fish that would fail to regulate their glucose fluxes when exogenous glucose is provided during graded swimming. Measured blood glucose concentrations are presented for control fish (●) and for those receiving exogenous glucose (▲). Theoretical concentrations are given for three different scenarios: 1) if Ra glucose had not been suppressed (○); 2) if Rd glucose had not been stimulated (△), and 3) if both, Ra and Rd, had remained at baseline throughout the infusion of exogenous glucose (□).