Q: Which of the following statement is true regarding hemodialysis?

A) 
Urea, creatinine and potassium move from blood to dialysate
Calcium and bicarbonate move from dialysate to blood.

B) 
Urea, creatinine, and calcium  move from blood to dialysate
Potassium and bicarbonate move from dialysate to blood.

C) 
Bicarbonate, creatinine and potassium move from blood to dialysate
Calcium and Urea move from dialysate to blood.

D) 
Urea, creatinine, Calcium and potassium move from blood to dialysate
Bicarbonate move from dialysate to blood.



Answer: A

In hemodialysis solutes passively diffuses down its concentration gradient from one fluid compartment into the other. Urea, creatinine, and potassium move from blood to dialysate, and calcium and bicarbonate move from dialysate to blood. The net effect is a reduction in the blood urea nitrogen and plasma creatinine concentration and an elevation in the plasma calcium and bicarbonate concentrations.