. Electrolytes in biological systems, incorporating papers presented at a symposium at the Marine Biological Laboratory in Woods Hole, Massachusetts, on September 8, 1954 . —•Ringer's solution, NoCN free X X Ringer's solution containing NoCN (0001 per Ml.) .^"e\ X—«x— bag weight ^ 3 "-«.y'' ^^ 3 relative concentrotion of Ringer's sol. / bag weight 2 0 3 ^/ Fig. 6. Upper two graphs: concentration gradients across the skin as found at the end of 12 hour experiments using 'inside-out' skin bags. Lower two graphs: changes in weights of the filled bags. All bags were f
. Electrolytes in biological systems, incorporating papers presented at a symposium at the Marine Biological Laboratory in Woods Hole, Massachusetts, on September 8, 1954 . —•Ringer's solution, NoCN free X X Ringer's solution containing NoCN (0001 per Ml.) .^"e\ X—«x— bag weight ^ 3 "-«.y'' ^^ 3 relative concentrotion of Ringer's sol. / bag weight 2 0 3 ^/ Fig. 6. Upper two graphs: concentration gradients across the skin as found at the end of 12 hour experiments using 'inside-out' skin bags. Lower two graphs: changes in weights of the filled bags. All bags were filled with 5 ml of normal Ringer's and immersed in 1. of normal Ringer's. Rana pipiens. Numbers at the graphs indicate number of experiments from which the plotted average values were obtained (24). Clo is the 'outside' chloride concentra- tion, Cli that of the inside. —of net salt uptake. If, however, an equivalent amount of Nal is added to the saline solution, then net salt transport is decreased by about 15%. In general, the conditions under which these experiments were carried out were such that the named salts were added to a Ringer's solution in quantities that would yield a final solution equivalent to Ringer's with respect to its sodium content. This solution represented the outside bath. The inside bath was un- supplemented Ringer's solution. It has been found, furthermore, that Br~, NOs"" and I~ partly replace Cl~ in active salt uptake. It was assumed that Br~, NO:r and I~ enter into competition with Cl~ for transport. Whereas, in the case
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