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Cellular Cl content and concentration of amphibian skeletal and heart muscle

Cellular Cl content and concentration of amphibian skeletal and heart muscle Department of Medicine, Chicago, Illinois 60637 Pritzker School of Medicine, The University PAGE of Chicago, MACCHIA, DONALD D., PHILIP I. POLIMENI, ERNEST PAGE. ular Cl content concentration of muscle. Am. J. Physiol. 235(3): C122-C127, 1978 or Am. J. Physiol.: Physiol. 4(2): C122-C127, 1978. Toads (Bufo marinus) frogs (Rana pipiens pipiens) were given intraperitoneal s of NaWl Na2W0,. Afier in vivo equilibration for 20-180 min, the animals were pithed, their ventricular semitendinosus muscles were excised. Measurements of total Cl (by titrimetry) Wl (by radioassay) showed that specific radioactivities of plasma mus les approached equality within 1 h after for toad muscle frog ventricles, indicating complete exchange of ular Cl with 36C1. From the simultaneously measured muscle water contents WO, spaces, intraular Cl concentrations in vivo (in pmolig water) for semitendinosus ventricular muscles were calculated to be, respectively, 1.4 ,t 0.3 2.3 k 0.8 for Bufo 1.7 t 0.7 4.8 2 2.4 for Rana. In view of these low values, active ular Cl accumulation seems improbable, but cannot be rigorously excluded without simultaneous membrane potential intraular ion activity measurements. A high concentration of Cl in the sarcoplasmic reticulum of muscle is also inconsistent with these measurements. chloride transport; coplasmic reticulum http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png AJP - Cell Physiology The American Physiological Society

Cellular Cl content and concentration of amphibian skeletal and heart muscle

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Publisher
The American Physiological Society
Copyright
Copyright © 1978 the American Physiological Society
ISSN
0363-6143
eISSN
1522-1563
Publisher site
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Abstract

Department of Medicine, Chicago, Illinois 60637 Pritzker School of Medicine, The University PAGE of Chicago, MACCHIA, DONALD D., PHILIP I. POLIMENI, ERNEST PAGE. ular Cl content concentration of muscle. Am. J. Physiol. 235(3): C122-C127, 1978 or Am. J. Physiol.: Physiol. 4(2): C122-C127, 1978. Toads (Bufo marinus) frogs (Rana pipiens pipiens) were given intraperitoneal s of NaWl Na2W0,. Afier in vivo equilibration for 20-180 min, the animals were pithed, their ventricular semitendinosus muscles were excised. Measurements of total Cl (by titrimetry) Wl (by radioassay) showed that specific radioactivities of plasma mus les approached equality within 1 h after for toad muscle frog ventricles, indicating complete exchange of ular Cl with 36C1. From the simultaneously measured muscle water contents WO, spaces, intraular Cl concentrations in vivo (in pmolig water) for semitendinosus ventricular muscles were calculated to be, respectively, 1.4 ,t 0.3 2.3 k 0.8 for Bufo 1.7 t 0.7 4.8 2 2.4 for Rana. In view of these low values, active ular Cl accumulation seems improbable, but cannot be rigorously excluded without simultaneous membrane potential intraular ion activity measurements. A high concentration of Cl in the sarcoplasmic reticulum of muscle is also inconsistent with these measurements. chloride transport; coplasmic reticulum

Journal

AJP - Cell Physiology – The American Physiological Society

Published: Sep 1, 1978

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