. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CARDIAC PHARMACOLOGY OF DAPHNIA 167 six experiments gave an inhibition averaging 21 per cent; and 10 5 in four experiments gave an average inhibition of 27 per cent. As can be seen by the graphs, the effect of acetylcholine is not completely reversible in every case. In some cases after dechlorinated b 20 253O 35 40 4550 55 60 65 TO 7580 85 90 95 100 105. FIG. 1. Effects of ucetylcholine (.1 B, C, D) and potassium (E, F) on the heart rate in Daphnia niagna. Specimens placed in solutions as indicated by arrows. Ach, acetylcho
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CARDIAC PHARMACOLOGY OF DAPHNIA 167 six experiments gave an inhibition averaging 21 per cent; and 10 5 in four experiments gave an average inhibition of 27 per cent. As can be seen by the graphs, the effect of acetylcholine is not completely reversible in every case. In some cases after dechlorinated b 20 253O 35 40 4550 55 60 65 TO 7580 85 90 95 100 105. FIG. 1. Effects of ucetylcholine (.1 B, C, D) and potassium (E, F) on the heart rate in Daphnia niagna. Specimens placed in solutions as indicated by arrows. Ach, acetylcholine, H2O dechlorinated tapwater. water was added following retardation,, the rate rose to only one-half the original rate. This indicates a toxic effect of acetylcholine on the heart of Daphnia, particularly at higher concentrations. Acetylcholine in higher concentrations (10~6 to 10~4) causes a series of events starting with a slowing of the heart rate followed by a. 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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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
