STUDIES IN CALCIUM URINARY EXCRETION WITH THE AID OF RADIOCALCIUM

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Abstract
Previous observations with p32 in the study of urinary excretion of P indicate that exogenous phosphate is handled differently from endogenous phosphate by the kidney. The injected phosphate, in a pure inorganic form, is excreted by the kidney at much higher speed than normal plasma phosphate. In the present studies radioactive Ca45, with a half life of 180 days, was used. Measurements show that exogenous Ca, unlike phosphate, is excreted by the kidney at the same rate as endogenous Ca of the plasma.
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