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Am J Physiol 191: 487-492, 1957;
0002-9513/57 $5.00
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Sodium Exchange in the Frog Heart Ventricle

John A. Johnson 1

1 From the Department of Physiology, University of Minnesota, Minneapolis, Minnesota

The isolated frog heart ventricle was used to study the kinetics of uptake and release of radioactive sodium. Sucrose was used as an extracellular space indicator. A flux of sodium across the ventricle cell membranes of 15 x 10–12 m/cm2 sec. was calculated from the data.

Note:
with the technical assistance of Jean Strait

Submitted on July 19, 1957






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