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Fig. 5. Relationships of glucose filtration, excretion and reabsorption rates to
plasma glucose concentration in the rainbow trout, allowing estimation of the
in vivo glucose transport maximum from the plateau in glucose
reabsorption. Points are for fish infused with glucose only and represent
individual fish at different times, not mean values. See text for details. The
equation of the regression line for glucose filtered is
y=5.547x–2.224 (r2=0.9615,
P<0.05), where y is the glucose filtration rate (µmol
kg–1 h–1) and x is the plasma
glucose concentration (mmol l–1). The equation of the
regression line for glucose excreted is y=0.942+log(1.207)
x1.207x (r2=0.9321,
P<0.01), where y is the glucose excretion rate (µmol
kg–1 h–1) and x is the plasma
glucose concentration (mmol l–1). The equation of the
regression line for glucose reabsorbed is
y=–96.182+246.349e–0.5{[(x–33.715)/23.302]2}
(r2=0.9149, P<0.05), where y is the
glucose reabsorption rate (µmol kg–1 h–1)
and x is the plasma glucose concentration (mmol
l–1).
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