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Renal dialysis involves passing blood from a patient past a dialysate solution in order to remove waste such as urea from the blood - HSC - SSCE Biology - Question 20 - 2022 - Paper 1
Question 20
Renal dialysis involves passing blood from a patient past a dialysate solution in order to remove waste such as urea from the blood. Which diagram correctly shows p... show full transcript
Worked Solution & Example Answer:Renal dialysis involves passing blood from a patient past a dialysate solution in order to remove waste such as urea from the blood - HSC - SSCE Biology - Question 20 - 2022 - Paper 1
Step 1
Identify the correct diagram for urea concentration
Answer
The correct diagram, as indicated by the marking scheme, is option D. In this diagram, the flow of the blood containing high levels of urea moves towards the dialysate solution which has low urea concentration. This setup facilitates the diffusion of urea from the blood to the dialysate, effectively cleansing the blood of waste products.