Calcium Homeostasis in the Normal and Thyroidectomized Bovine
- 1 January 1972
- journal article
- research article
- Published by Georg Thieme Verlag KG in Hormone and Metabolic Research
- Vol. 4 (04) , 300-303
- https://doi.org/10.1055/s-0028-1094072
Abstract
In three thyroidectomized mature dairy cows daily intramuscular injection of a very small dose of vitamin D3 (200,000 u/day/animal for six days) induced a slight but significant hypercalcemia and hyperphosphatemia which did not appear in three control cows. In three thyroidectomized steers, a physiological dose of parathormone (40 ng/min/kg for 7 hrs) or a very slight increase in daily calcium intake (40 gm/day/animal) induced a highly significant increase in plasma calcium: similar treatments had no effect on the calcemia of control steers.Keywords
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