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The Journal of General Physiology, Vol 14, 405-419, Copyright © 1931 by The Rockefeller University Press

ARTICLE

FURTHER STUDIES ON THE KINETICS OF OSMOSIS IN LIVING CELLS

Balduin Lucké 1, H. Keffer Hartline 1, and Morton McCutcheon 1

1 From the Laboratory of Pathology, School of Medicine, the Johnson Foundation for Medical Physics, University of Pennsylvania, Philadelphia, and the Marine Biological Laboratory, Woods Hole

Using unfertilized eggs of Arbacia punctulata as natural osmometers an attempt has been made to account for the course of swelling and shrinking of these cells in anisotonic solutions by means of the laws governing osmosis and diffusion. The method employed has been to compute permeability of the cell to water, as measured by the rate of volume change per unit of cell surface per unit of osmotic pressure outstanding between the cell and its medium.

Permeability to water as here defined and as somewhat differently defined by Northrop is approximately constant during swelling and shrinking, at least for the first several minutes of these processes.

Permeability is found to be independent of the osmotic pressure of the solution in which cells are swelling.

Water is found to leave cells more readily than it enters, that is, permeability is greater during exosmosis than during endosmosis.


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 Cold Spring Harb Symp Quant BiolHome page
B. Lucke
THE LIVING CELL AS AN OSMOTIC SYSTEM AND ITS PERMEABILITY TO WATER: (Experiments with egg cells of marine invertebrates)
Cold Spring Harb Symp Quant Biol, January 1, 1940; 8(0): 123 - 132.
[Abstract] [PDF]


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