This is why cord blood can be used for transplantation as an alternative to bone marrow. Cord blood is being used increasingly on an experimental basis as a source of stem cells, as an alternative to bone marrow. Most cord blood transplants have been performed in patients with blood and immune system diseases.
(= (S + (p. . Solute potential is at a maximum at zero (distilled water), whereas pressure potential can be negative (vacuum), zero (one atmosphere), or positive (greater than zero). So distilled water at normal atmospheric pressure has a water potential of zero ((= 0).
â¢ Introduction â¢ All cells have a potential difference across their plasma membrane. â¢ That is, the potential or chemical charge inside of the cell is different to that of the solution outside of the cell. â¢ This potential difference is referred to as the membrane potential. â¢ In most cells the resting membrane potential is negative (i.e., inside of the cell is negative with respect the outside, which serves as the reference).