Final answer:
Ringer's Lactate is not a colloid solution; it is a crystalloid. Colloids, including Fresh Frozen Plasma, Dextran, and Albumin, contain larger molecules that help in maintaining blood volume whereas crystalloids like Ringer's Lactate are electrolyte solutions that maintain fluid balance.
Step-by-step explanation:
Within the choices provided, the substance that is not a colloid solution is Ringer's Lactate. This solution is a crystalloid, not a colloid. Colloids, such as Fresh Frozen Plasma, Dextran, and Albumin, have larger molecules or particles that do not dissolve completely and can help maintain blood volume and pressure. Conversely, Ringer's Lactate is a solution of electrolytes that is isotonic, meaning it has a similar concentration of solutes as blood, which is important because it helps to maintain the fluid balance in and out of the cells without causing cells to shrink or swell excessively.
Albumin, a key component of Fresh Frozen Plasma and naturally present in serum, is the most abundant plasma protein and plays a critical role in maintaining oncotic pressure, which, contrary to the incorrect statement, actually draws water into the blood vessels from the body's tissues.
Dextran, a polysaccharide consisting of alpha-D-glucose molecules, is created by bacteria and yeasts. Its structure allows it to absorb water, which enables it to function effectively as a plasma substitute by expanding the volume of the plasma phase in the blood.