Hepatic glycemic response during freezing and thawing.

<p>Liver glycogen content (A) and glucose output (B) during freezing and thawing in Alaskan and Ohioan <i>R. sylvatica</i> as compared to that in unfrozen frogs (U) (mean ± SEM; <i>N</i> = 4–8). Glucose output (B) was calculated by subtracting the mean liver glycogen content (µmol liver ⁻¹) remaining at each sample from the mean liver glycogen content of unfrozen frogs. Asterisk indicates that the value differs from the mean for the corresponding sample of unfrozen frogs (Dunnett’s, <i>P</i><0.05). Some overlapping values were slightly offset along the abscissa for clarity.