. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 34 MASASHI ENAMI 100 <0 <o — Uj 1 I i f. 0 30 60 90 120 150 180 TIME IN MINUTES 4 in CONCENTRA JION IN T. E. FIGURE 4. Curve showing relationship between percentage of magnitude of effectiveness and concentration of brain extract from adult 5\ dehaani. Figure inserted indicates method of esti- mation of magnitude of effectiveness: Area enclosed by time relation curve of response of black chromatophores and a horizontal line representing initial pigmentary state of the chromatophores was measured and designated to be ma
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 34 MASASHI ENAMI 100 <0 <o — Uj 1 I i f. 0 30 60 90 120 150 180 TIME IN MINUTES 4 in CONCENTRA JION IN T. E. FIGURE 4. Curve showing relationship between percentage of magnitude of effectiveness and concentration of brain extract from adult 5\ dehaani. Figure inserted indicates method of esti- mation of magnitude of effectiveness: Area enclosed by time relation curve of response of black chromatophores and a horizontal line representing initial pigmentary state of the chromatophores was measured and designated to be magnitude of effectiveness () of given extract. of 1 per cc. was taken as standard value, against which percentile ratio of of respective concentration was calculated. inside out facilitated detailed examination of the behavior of the white chromato- phores, which are located in the deepest layer of the skin and are masked in various degrees when viewed from the outer surface of the carapace. The correlated re- sponses of the cells with the black ones under the influence of the extracts of brain and Medulla terminalis were clearly demonstrated in the course of the experiments (Fig. 5). Hormone Production by Nervous Organs The foregoing results indicated that a kind of chromatophorotropic hormone, or a group of hormones, which, with respect to its qualitative effect, appeared to be identical with the one included in the sinus gland (sinus gland hormone), was almost universally distributed in the central nervous system of adult Sesarma. The ques- tion arose whether such a kind of hormone was originating essentially in the nervous tissue or whether it was derived from the sinus gland and stored in the former. The question seemed to be answered in part by the fact that the effectiveness of extracts of some ganglionic tissues exceeded that of the sinus gland extract, which fact might suggest that the hormone under consideration was more concentrated in certai
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
