Final answer:
The potassium load in Packed Red Blood Cells (PRBCs) is b) 20 mEq/L, a clinically significant concentration that is monitored in the context of potential blood transfusions.
Step-by-step explanation:
The potassium load in Packed Red Blood Cells (PRBCs) is an important consideration in transfusion medicine. Potassium is the principal ion in the fluid inside of cells, including erythrocytes, otherwise known as red blood cells. It is understood that normal potassium concentrations are significantly higher inside the cells than outside. In the context of PRBCs, the potassium load can increase over time due to storage-related changes such as the leak of potassium out of the aging red blood cells into the surrounding plasma.
The correct answer to the question regarding the potassium load in PRBCs is b) 20 mEq/L. It is essential to understand this concentration as it has clinical relevance, especially when considering blood transfusions in patients who may be at risk for hyperkalemia, a condition where there is too much potassium in the blood.