. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ELECTROLYTES IN PHASCOLOSOMA MUSCLE 447 The behavior of potassium in the muscles was studied by immersing muscles in solutions of varying potassium content made by diluting either an artificial potassium-free sea water (Allen's formula) or nor- mal sea water with isotonic KC1 solution. For each solution being tested, two batches of muscles were used, the one to be analyzed for 55-n 50- 45- 40- 35- 30- 25- 20- 15- 10- 5- . k » Cl - space o % gain in weight. t -100 60 60 .4. 20 10 15 20 25 30 Meq % in solution 35 40 45 50 55 F
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ELECTROLYTES IN PHASCOLOSOMA MUSCLE 447 The behavior of potassium in the muscles was studied by immersing muscles in solutions of varying potassium content made by diluting either an artificial potassium-free sea water (Allen's formula) or nor- mal sea water with isotonic KC1 solution. For each solution being tested, two batches of muscles were used, the one to be analyzed for 55-n 50- 45- 40- 35- 30- 25- 20- 15- 10- 5- . k » Cl - space o % gain in weight. t -100 60 60 .4. 20 10 15 20 25 30 Meq % in solution 35 40 45 50 55 FIG. 2. Potassium concentrations in Phascolosoma muscles (•), weight changes (O) and chloride space (A) plotted against potassium concentrations in the external medium. Tissues soaked 6 to 8 hours. Solutions made up by diluting sea water with potassium chloride solutions. Cross indicates highest potassium concentration at which irritability is maintained. The curve for potas- sium in the cells represents potassium concentrations calculated as outlined in Table II. Concentrations in milliequivalents per hundred grams solution or final wet weight of tissue. potassium, the other for chloride. Initial and final weights were re- corded. The results are reported in terms of milliequivalents per hun- dred grams (meq per cent) final wet weight of tissue. Figure 2 sum- marizes the results. Potassium is lost from the tissue to K-free. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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