Fig. 3. Allometric relationship between body mass and sodium pump molecular
activity in the brain of mammals and birds. Values are means ±
S.E.M. Molecular activity values were calculated by dividing
maximal Na+, K+-ATPase activity at 37°C by the
sodium pump density for the same animal. Data from Tables
1 and
2. The lines are best power
fits to the data as described by the inset equations.