. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PERMEABILITY OF TROUT ERYTHROCYTES 327 F'() 500 n 400- 300- 200- 100- 0. -X 0 TIME IN MINUTES FIGURE 4. Experimental times plotted against F'(C, V) for rainbow trout and urea pene- tration. The procedure was the same as for Figure 3 and the symbols have the same significance. plotted against F(C, V) indicates that there is no evidence of saturation. The family of straight lines obtained with the F'(C, V) plot is also evidence of the same thing. From the data presented in Figure 6. it can be seen that in the case of brook
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PERMEABILITY OF TROUT ERYTHROCYTES 327 F'() 500 n 400- 300- 200- 100- 0. -X 0 TIME IN MINUTES FIGURE 4. Experimental times plotted against F'(C, V) for rainbow trout and urea pene- tration. The procedure was the same as for Figure 3 and the symbols have the same significance. plotted against F(C, V) indicates that there is no evidence of saturation. The family of straight lines obtained with the F'(C, V) plot is also evidence of the same thing. From the data presented in Figure 6. it can be seen that in the case of brook trout-thiourea and rainbow-thiourea the three points fall on a straight line parallel to the x-axis, predicting simple diffusion. Except for one or two of the other values in the figure, the three points in each case fall on a line almost parallel to the x-axis, suggesting simple diffusion in each case. From the calculated values for the x-intercept (Table I) it can readily be seen that most of these figures are very large (approaching infinity ) and some are even negative. This means that the shrinking data, like the swelling data indicate that these four nonelectrolytes enter the erythrocytes of these four species of fish by simple diffusion (cf., Kaplan, Hays and Hays, 1974). Comparisons of relative rates of penetration can be made using the numbers in Table I and the values in Figure 6. The absolute values are not directly comparable from the table to the figure since different concentrations of penetrants were used in the two series of experiments. Both sets of data indicate that the rates of entrance and of exit of a given nonelectrolyte are quite similar in these four closely related species. All four species have the highest permeability to ethylene glycol, then thiourea, next urea, with the lowest permeability being to glycerol. This agrees with Jacobs' data (Jacobs, 1931b, 1935).. Please note that these images are extracted from scanned page images that may have been
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
