Bio lab: does glucose pass through the dialysis tubing?
Glucose does pass through the dialysis tubing, but there is also an equal amount of glucose from the dialysis fluid entering the blood in the dialysis tubing. We say that there is no NET change in glucose concentration in the blood. This is because there is an equal concentration of glucose in the bloof and dialysis fluid. Hence, the glucose concentration of the blood will be the same when it leaves and re-enters the body. Only urea and excess salt pass through the dialysis tubing. Proteins and blood cells and other large components of blood are too large to pass through the semi-permeable dialysis tubing, hence they remain in the blood.
