. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 54 JOHN H. WELSH AND ALAN G. SLOCOMBE Helix heart in response to treatment with magnesium ions, and demonstrated that if the waves were analyzed as the sums of two diphasic waves of opposite sign and different speeds of propagation, the complex changes in the observed wave form could be interpreted as changes in the synchrony of the two diphasic components. The wave form of the ECG follows the type of pattern which Prosser (1950) and Prosser, Bishop, Brown, Jahn, and Wulff (1950) have described as indicating a myogenic heart


. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 54 JOHN H. WELSH AND ALAN G. SLOCOMBE Helix heart in response to treatment with magnesium ions, and demonstrated that if the waves were analyzed as the sums of two diphasic waves of opposite sign and different speeds of propagation, the complex changes in the observed wave form could be interpreted as changes in the synchrony of the two diphasic components. The wave form of the ECG follows the type of pattern which Prosser (1950) and Prosser, Bishop, Brown, Jahn, and Wulff (1950) have described as indicating a myogenic heart. E. Effect of tetraethylammonium ions on clcctrotonus The addition of Et4N to the bath produced significant changes in the response to anelectrotonus. In obtaining the records shown in Figure 7A, the heart was stimulated for 30 seconds at a voltage which would just give 100% inhibition. Fol- lowing the stimulus, there was a sudden increase in tonus. This was followed by. 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