Cellular glucose concentration the concentration of glucose in human blood plasma is maintained at about 5 mm. the concentration of free glucose inside a myocyte is much lower. why is the concentration so low in the cell? what happens to glucose after entry into the cell? glucose is administered intravenously as a food source in certain clinical situations. given that the transformation of glucose to glucose 6-phosphate consumes atp, why not administer intravenous glucose 6-phosphate instead?