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7302 Surgery

The absorption of glucose from the gut into intestinal mucosal cells is coupled to Na+,K+ ATPase. In contrast, the movement of glucose from the intestinal epithelial cells into the submucosal bloodstream occurs through passive transpo. Given these facts, which of the following statements can be true at one time or another?

ALevels of plasma glucose are approximately equal to levels in the cytosol of intestinal epithelial cells
BFree glucose levels in the lumen of the intestine can never be higher than levels in intestinal cells
CPlasma glucose levels are much higher than intestinal cell cytosolic levels of glucose
DLevels of glucose in the intestinal lumen are always higher than those in the cytosol of intestinal epithelial cells
Surgery
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