Glucose effect on PDt in rat and laying-hen small intestine both in presence and absence of calcium.

The effect on the transmural potential from adding glucose under different conditions of sodium and calcium has been studied in rat and laying-hen intestine in vitro with the technique for measuring Transmural Potential Difference. The glucose, in sodium-free mediums, has no effect on the Transmural Potential Difference in rat intestine, whether calcium be present or absent. As to hen intestine, the PDt increased when calcium is present in the medium, both in the absence and presence of sodium. Glucose absorption was also determined in vivo by using mediums with/without calcium. In rat intestine glucose absorption was not affected by the presence of calcium, while its presence enhanced glucose absorption in hen intestine.