The 20th century saw the development of kidney dialysis. What does this device do?

• A. Replaces heart function
• B. Monitors brain activity
• C. Replaces kidney function
• D. Assists breathing

Answer: (C)

The device is aimed at substituting the kidneys’ job of filtering the blood. Kidneys normally remove waste products and extra water from the bloodstream and help balance electrolytes. When kidneys fail, toxins build up and fluid balance gets disrupted. Dialysis provides a machine-based or peritoneal filtration process that cleans the blood and helps restore this balance, effectively replacing the kidney’s filtration function. It does not perform heart pumping, monitor brain activity, or help with breathing, which is why the other options aren’t correct. Dialysis can be done with different methods (like hemodialysis or peritoneal dialysis), but all share the goal of substituting kidney filtration.