. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OSMOTIC STUDIES OF OVARIAN EGGS 477 TABLE XI Changes in salt content ( X /05) of ovarian eggs of Hyia labialis placed in solutions of KCl of different osmotic pressures KCl KCl KCl KCl KCl Hyla no. Na K Na K Na K Xa K Na K 1 2 3 Average sidering only Na and K, these eggs have a salt content equivalent to
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OSMOTIC STUDIES OF OVARIAN EGGS 477 TABLE XI Changes in salt content ( X /05) of ovarian eggs of Hyia labialis placed in solutions of KCl of different osmotic pressures KCl KCl KCl KCl KCl Hyla no. Na K Na K Na K Xa K Na K 1 2 3 Average sidering only Na and K, these eggs have a salt content equivalent to M NaCl. This value seems a little high but at least it suggests that two assumptions are probably quite reasonable: (1) that Na and K constitute the major quantity of cations in these eggs and (2) NaCl should have an osmotic pressure much closer to that of the eggs than NaCl. When Bujo eggs are placed in solutions of NaCl with osmotic pressures not much different from that which is assumed to be isotonic, the per cent of water and the amount of Na in the eggs increase in all of the solutions, but the amount of K does not change appreciably. In solutions of KCl of the same concentrations, the per cent of water increases approximately the same amount, the amount of K increases and Na decreases. These observations show that water, Na and K can move into and out of the eggs to a limited extent, at least. The cations did not exchange to diffusion equilibrium during the duration of these experiments. The question as to whether or not these Bujo eggs are behaving as osmometers is dim"- LJ D _J OLCH. FIGURE 4. Ovarian eggs of Bufo (with follicular layers) when placed in solutions of KCl of different concentrations. A, volume changes; !H, water content per egg; O, % water; • , average of the three preceding Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and
Size: 2428px × 1029px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
