Which of the Following Best Indicates the Role of Albumin

Question

Which of the following best indicates the role of albumin in water balance?
A) Blocks the renal reabsorption of Na+
B) Enhances the renal excretion of K+
C) Maintains plasma oncotic pressure
D) "Plugs up" capillary pores, keeping water in the plasma

Accepted Answer

Albumin maintains plasma oncotic pressure, which is necessary for proper fluid balance between the blood vessels and the tissues. This imbalance can lead to edema or dehydration if not properly regulated. Albumin is not involved in blocking renal reabsorption of Na+ or enhancing renal excretion of K+, and it does not "plug up" capillary pores.