. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGURE 2. Mitella. Electrical activity recorded from the stalk nerve. A, Spontaneous activity in the dark. B, The "off" response. C, The effect of multiple shadows of 300-milli- second duration. In this record a response was still evident after 30 such shadows. Down- ward deflection of lower trace indicates "off," upward deflection "on" in this and all records to follow. ous bursts, there is a more prolonged response, followed by a longer than expected period of silence, and no activity at the c
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGURE 2. Mitella. Electrical activity recorded from the stalk nerve. A, Spontaneous activity in the dark. B, The "off" response. C, The effect of multiple shadows of 300-milli- second duration. In this record a response was still evident after 30 such shadows. Down- ward deflection of lower trace indicates "off," upward deflection "on" in this and all records to follow. ous bursts, there is a more prolonged response, followed by a longer than expected period of silence, and no activity at the cessation of shading (Fig. 2, B). Multiple shadows of 300 milliseconds duration at two-second intervals elicited a response at each shadow, but adapted somewhat with succeeding stimuli although a definite response was still evident after 30 such shadows (Fig. 2, C). Two hundred millisecond shadows at intervals failed to give repetitive responses, and 100 millisecond shadows at one-second intervals gave a significantly smaller initial response and failed to summate. Shadows of shorter duration failed to elicit any response. The relationship between shadow duration threshold and light intensity was not investigated in this 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
