Multiple Choice
Which of the following structures is responsible for transporting urine from the kidneys to the urinary bladder?
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25. The Urinary System
Introduction to the Urinary System
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Why is the dialysate continually replaced during hemodialysis?
A
To maintain a concentration gradient for waste removal from the blood
B
To increase the blood pressure of the patient
C
To prevent blood from clotting in the dialysis machine
D
To supply oxygen directly to the blood
Verified step by step guidance1
Understand the purpose of hemodialysis: Hemodialysis is a medical procedure used to remove waste products, toxins, and excess fluids from the blood when the kidneys are not functioning properly. The dialysate plays a key role in this process.
Learn about the dialysate: Dialysate is a specially formulated fluid that helps draw waste products and toxins out of the blood through diffusion. It contains a balanced concentration of electrolytes and other substances to facilitate this exchange.
Recognize the importance of the concentration gradient: Waste removal during hemodialysis relies on the principle of diffusion, where substances move from an area of higher concentration (blood) to an area of lower concentration (dialysate). To maintain this gradient, the dialysate must be continually replaced.
Consider the consequences of not replacing the dialysate: If the dialysate is not replaced, it will become saturated with waste products, reducing the concentration gradient and making the removal of toxins from the blood less effective.
Connect the explanation to the correct answer: The dialysate is continually replaced to ensure the concentration gradient is maintained, allowing efficient waste removal from the blood during hemodialysis. This aligns with the correct answer provided in the problem.
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