. Electrolytes in biological systems, incorporating papers presented at a symposium at the Marine Biological Laboratory in Woods Hole, Massachusetts, on September 8, 1954 . RIGHT BAG IN RINGER'S LEFT BAG IN RINGER'S I I RIGHT BAG IN RINGER'S I I ^H LEFT BAG IN K*^FREE RINGER^Bl Fig. 7. Active salt and fluid transport by skin in complete Ringer's (left part of figure, averages of 11 experiments) and by skin in K"'"-free Ringer's (right part of figure, averages of 8 experiments). Method of paired bags. Rana pipiens. Twelve hour experiments. Loss of electrolytes and water from fluid com
. Electrolytes in biological systems, incorporating papers presented at a symposium at the Marine Biological Laboratory in Woods Hole, Massachusetts, on September 8, 1954 . RIGHT BAG IN RINGER'S LEFT BAG IN RINGER'S I I RIGHT BAG IN RINGER'S I I ^H LEFT BAG IN K*^FREE RINGER^Bl Fig. 7. Active salt and fluid transport by skin in complete Ringer's (left part of figure, averages of 11 experiments) and by skin in K"'"-free Ringer's (right part of figure, averages of 8 experiments). Method of paired bags. Rana pipiens. Twelve hour experiments. Loss of electrolytes and water from fluid compartment at epithelial side is indicated by negative figures, gain of electrolytes is indicated by positive figures. Arbitrarily, changes in Na+ and H2O in the left bag are set equal to 100. Other values are given in proportion to these refer- ence values (26). slum has now been worked out; furthermore, the correlation between extra- cellular potassium concentration and net active uptake and transport of sodium chloride and water has been established. Data were obtained, simultaneously, on intracellular sodium, movements of K"*" into or out of skin and also on skin potentials. In these studies, saline solutions, pH = , contained NaCl, KCl, and some NaHCOs. Three levels of NaCl were chosen, namely 48; 119; 169 /zEq/ml, corresponding roughly to ; ; Ringer's. To these solutions, KCl was
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