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Literature DB >> 11526838

Osmometrically determined characteristics of the cell membrane of squid and lobster giant axons.

A R Freeman¹, J P Reuben, P W Brandt, H Grundfest.

Abstract

Lobster and squid giant nerve fibers respond differently when subjected to osmotic challenges. The axons proper, as distinct from the total (fiber) complex formed by the axon and connective sheath, both behave as "fast" osmometers for changes in the concentration of NaCl, but the maximum degree of swelling in hyposmotic media is by about 60% in lobster and only by 20% in squid. The relative volume intercepts of the van't Hoff relation are about 0.2 for lobster and 0.4 for squid. The sheaths of both axons undergo only small, apparently passive changes in volume. Lobster axons are permeable to Cl, but squid axons are impermeable to this anion. Lobster axons are also permeable to glycerol. The implications of the data as to the nature of volume regulation of cells are discussed.

Entities: Chemical Disease Species

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Year: 1966 PMID： 11526838 PMCID： PMC2225644 DOI： 10.1085/jgp.50.2.423

Source DB: PubMed Journal: J Gen Physiol ISSN： 0022-1295 Impact factor: 4.086

23 in total

1. EVIDENCE FOR CONTINUITY BETWEEN THE CENTRAL ELEMENTS OF THE TRIADS AND EXTRACELLULAR SPACE IN FROG SARTORIUS MUSCLE.

Authors: H E HUXLEY
Journal: Nature Date: 1964-06-13 Impact factor: 49.962

2. MUSCLE: VOLUME CHANGES IN ISOLATED SINGLE FIBERS.

Authors: J P REUBER; E LOPEZ; P W BRANDT; H GRUNDFEST
Journal: Science Date: 1963-10-11 Impact factor: 47.728

3. Replacement of the axoplasm of giant nerve fibres with artificial solutions.

Authors: P F BAKER; A L HODGKIN; T I SHAW
Journal: J Physiol Date: 1962-11 Impact factor: 5.182

4. Potassium chloride movement and the membrane potential of frog muscle.

Authors: R H ADRIAN
Journal: J Physiol Date: 1960-04 Impact factor: 5.182

5. The influence of potassium and chloride ions on the membrane potential of single muscle fibres.

Authors: A L HODGKIN; P HOROWICZ
Journal: J Physiol Date: 1959-10 Impact factor: 5.182

6. Heterogeneity of excitable membrane: electrophysiological and pharmacological evidence and some consequences.

Authors: H Grundfest
Journal: Ann N Y Acad Sci Date: 1966-07-14 Impact factor: 5.691

7. The effect of internal sodium on the action potential in the presence of different internal anions.

Authors: W K Chandler; A L Hodgkin
Journal: J Physiol Date: 1965-12 Impact factor: 5.182

8. Characterization of the resting axolemma in the giant axon of the squid.

Authors: R VILLEGAS; F V BARNOLA
Journal: J Gen Physiol Date: 1961-05 Impact factor: 4.086

9. Membrane potentials of the lobster giant axon obtained by use of the sucrose-gap technique.

Authors: F J JULIAN; J W MOORE; D E GOLDMAN
Journal: J Gen Physiol Date: 1962-07 Impact factor: 4.086

10. EVIDENCE FOR ANION-PERMSELECTIVE MEMBRANE IN CRAYFISH MUSCLE FIBERS AND ITS POSSIBLE ROLE IN EXCITATION-CONTRACTION COUPLING.

Authors: L GIRARDIER; J P REUBEN; P W BRANDT; H GRUNDFEST
Journal: J Gen Physiol Date: 1963-09 Impact factor: 4.086

13 in total

4. An examination of the effects of osmotic pressure changes upon transmitter release from mammalian motor nerve terminals.

Authors: J I Hubbard; S F Jones; E M Landau
Journal: J Physiol Date: 1968-08 Impact factor: 5.182

10. Permeability of alkali metal cations in lobster muscle. A comparison of electrophysiological and osmometric analyses.

Authors: H Gainer; H Grundfest
Journal: J Gen Physiol Date: 1968-03 Impact factor: 4.086

Osmometrically determined characteristics of the cell membrane of squid and lobster giant axons.

1. EVIDENCE FOR CONTINUITY BETWEEN THE CENTRAL ELEMENTS OF THE TRIADS AND EXTRACELLULAR SPACE IN FROG SARTORIUS MUSCLE.

2. MUSCLE: VOLUME CHANGES IN ISOLATED SINGLE FIBERS.

3. Replacement of the axoplasm of giant nerve fibres with artificial solutions.

4. Potassium chloride movement and the membrane potential of frog muscle.

5. The influence of potassium and chloride ions on the membrane potential of single muscle fibres.

6. Heterogeneity of excitable membrane: electrophysiological and pharmacological evidence and some consequences.

7. The effect of internal sodium on the action potential in the presence of different internal anions.

8. Characterization of the resting axolemma in the giant axon of the squid.

9. Membrane potentials of the lobster giant axon obtained by use of the sucrose-gap technique.

10. EVIDENCE FOR ANION-PERMSELECTIVE MEMBRANE IN CRAYFISH MUSCLE FIBERS AND ITS POSSIBLE ROLE IN EXCITATION-CONTRACTION COUPLING.

1. Localization of ionic conductances in crayfish muscle fibers.

2. Contributions of various ions to the resting and action potentials of crayfish medial giant axons.

3. Cytoplasmic gel and water relations of axon.

4. An examination of the effects of osmotic pressure changes upon transmitter release from mammalian motor nerve terminals.

5. Osmotic relations of nerve fiber.

6. Effects of an outward water flow on potassium currents in a squid giant axon.

7. Osmotic behaviour of isolated axons of a euryhaline and a stenohaline crustacean.

8. Ionic permeability of the inhibitory postsynaptic membrane of lobster muscle fibers.

9. Osmotic properties of the squid giant axon and their modifications.

10. Permeability of alkali metal cations in lobster muscle. A comparison of electrophysiological and osmometric analyses.