<prompt> Adding glucose to stored blood causes?-Prevent hemolysisGives nutrition to cellsIncrease acidosis of bloodPrevent Hyperkalemia  <response>: Changes in quality of blood units containing one and a half or double amounts of glucose, stored at 4 degrees C for three weeks were analysed. An experimental preservative containing glucose and fructose 1 : 1 was also used. No other additives purine or purine-nucleoside were applied. A standard CPD preservative of the National Inst. of Haematology and Blood Transfusion was used as control. The pH, plasma free haemoglobin, K content, red blood cell RBC ATP and 2,3-DPG content, and RBC fragility index were determined in each sample. Increase of glucose concentration, the addition of fructose had a beneficial effect on blood pH, and on plasma free haemoglobin and K concentration. 150 glucose improved the 2,3-DPG maintenance in stored blood Ref Robbins 9e pg22 