. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 590 RALPH I. SMITH. 100 200 300 No of medium, mM/l 400 500 FIGURE 1. Steady-stafe Na-exchange in N. diversicolor (as influx of 22Na into whole body) as a function of external concentration. Closed circles and solid curve calculated from one-hour exposures; open circles by interpolation to one hour; number of worms (n) is shown by each point. In this and following figures, vertical bars show ± 2 Dotted curve shows passive integumental diffusional efflux, proportional to coelomic Na-concentration (deter- mined on 98 worms
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 590 RALPH I. SMITH. 100 200 300 No of medium, mM/l 400 500 FIGURE 1. Steady-stafe Na-exchange in N. diversicolor (as influx of 22Na into whole body) as a function of external concentration. Closed circles and solid curve calculated from one-hour exposures; open circles by interpolation to one hour; number of worms (n) is shown by each point. In this and following figures, vertical bars show ± 2 Dotted curve shows passive integumental diffusional efflux, proportional to coelomic Na-concentration (deter- mined on 98 worms), calculated on the assumption that Na-permeability of body wall does not change with salinity. Diagonal straight line shows passive diffusional influx, proportional to external Na-concentration, also assuming no change in Na-permeability, and assuming that total exchange in 75/£ SW is passive. Pattern of steady-stale chloride exchange as a junction of salinity. The rate of Cl-uptake or steady-state exchange in N. diversicolor as a function of the external chloride concentration has been shown by JpYgensen and Dales (1957) and Smith (1970a) to have a characteristic pattern with the exchange proportional to external chloride concentration in salinities greater than 50% SW, a more or less constant level over the intermediate range of salinities, a tendency to show a peak of exchange in low salinities (± 10% SW), and a marked reduction in very low salinities (down to SW, = ca. HIM Cl/litcr). Smith (1970a) con- structed a balance-sheet for chloride exchanges, using the assumptions of Potts and. 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, 1870-19
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
