Influence of cholecalciferol (vitamin D₃) on the initial kinetics of the uptake of calcium ions by rat small-intestinal mucosa (Short Communication) Available to Purchase

The uptake of Ca²⁺ by isolated small-intestinal mucosa from vitamin D-depleted and -repleted rats was analysed for the effects of vitamin D on initial kinetics. The rapid association of Ca²⁺ with the tissue, which is complete within 1min, was unaffected by the vitamin, whereas the subsequent, linear, uptake was significantly increased. Neither the tissue space accessible to inulin nor the permeability to thiourea was influenced by vitamin D treatment.