Ion Fluxes and Short-Circuit Current in Internally Perfused Cells of Valonia ventricosa
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چکیده
منابع مشابه
Ion Fluxes and Short-Circuit Current in Internally Perfused Cells of Valonia ventricosa
Ion transport in the giant celled marine alga, Valonia ventricosa, was studied during internal perfusion and short-circuiting of the vacuole potential. The perfusing and bathing solutions were similar to natural Valonia sap and contained the following concentrations of major ions: Na 51, K 618, and Cl 652 mM. The average short-circuit current (I(sc)) was 97 pEq/cm(2) sec (inward positive curren...
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The acid-induced loosening of cell walls of Valonia ventricosa has been compared to that of frozen-thawed oat coleoptiles. The two acid extension responses are similar in regard to the shape of the pH response curve and the increase in plastic compliance induced by acid treatment. In both systems the acid response can be inhibited by Ca(2+) and in both the removal of the protons leads to a rapi...
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We studied contraction in single voltage-clamped, internally perfused myocytes isolated from guinea pig ventricles. The microscopic appearance of the cell was observed and recorded with a television system, while contractile shortening was measured 1,000 times/s using a linear photodiode array. Uniform, synchronous sarcomere shortening occurred in response to depolarizations that triggered a sl...
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This paper is a continuation of the study of the penetration of oxidation-reduction indicators into living plants of Valonia ventricosa. Two indicators have been used, namely, meta-bromo-phenol indophenol and guaiacol indophenol. The first one is the most positive of any of the indicators so far used in this series and is very readily reduced by living cells. The second one is in the region of ...
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We studied contraction in single voltage-clamped, internally perfused myocytes isolated from guinea pig ventricles . The microscopic appearance of the cell was observed and recorded with a television system, while contractile shortening was measured 1,000 times/s using a linear photodiode array. Uniform, synchronous sarcomere shortening occurred in response to depolarizations that triggered a s...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1967
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.50.7.1821