Studies on Calcium Metabolism

Abstract

Parathyroid extract was found to cause as great an increase in serum Ca of eviscerated cats as in normal animals. Furthermore, Ca excretion into the colon was not decreased following the administration of parathyroid extract. The authors conclude that the hormone acts neither through controlling Ca absorption nor through regulating Ca excretion, but in some way controls the distribution of Ca between the blood and the tissues. The liver, spleen, pancreas, pituitary, thyroid and central nervous system appeared to be in no way necessary to the process.