Abstract
Summary
This study investigated the influence of hyperthyroidism on intestinal calcium absorption with an in vivo perfusion technique in the rat duodenum. Net movement, plasma to lumen and lumen to plasma fluxes, although slightly decreased, were not statistically significantly different in hyper-thyroid animals compared to normal animals. These results do not support the theory of decreased calcium absorption in the duodenum as a major factor contributory to the increased fecal excretion of calcium seen in hyper thyroid rats.
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