A dialysis membrane is selectively permeable, and substances smaller than proteins are able to pass through. The dialysis machine allows blood to flow past one side of the dialysis membrane and the dialysis fluid flows on the other side of the membrane. If you wanted to use a dialysis machine to remove only urea (a small molecule) from blood, what could you use for the dialysis fluid?Multiple ChoiceA solution that is isotonic and contains the same concentration of substances as blood, except for having no urea in itWhole bloodHypertonic saltwaterDistilled waterA solution that is isotonic and contains only protein
Question
A dialysis membrane is selectively permeable, and substances smaller than proteins are able to pass through. The dialysis machine allows blood to flow past one side of the dialysis membrane and the dialysis fluid flows on the other side of the membrane. If you wanted to use a dialysis machine to remove only urea (a small molecule) from blood, what could you use for the dialysis fluid?Multiple ChoiceA solution that is isotonic and contains the same concentration of substances as blood, except for having no urea in itWhole bloodHypertonic saltwaterDistilled waterA solution that is isotonic and contains only protein
Solution
The correct answer is "A solution that is isotonic and contains the same concentration of substances as blood, except for having no urea in it". This is because the dialysis process works on the principle of diffusion, where substances move from an area of high concentration to an area of low concentration. If the dialysis fluid contains no urea, then urea in the blood (which is at a higher concentration) will move across the dialysis membrane into the dialysis fluid (where the urea concentration is lower). The other substances in the blood, which are present in the same concentration in the dialysis fluid, will not move across
Similar Questions
Dialysis is a medical treatment used when a person’s kidneys are no longer able to function. During this process, a machine uses an artificial membrane to remove waste products from the blood. Which body system below is not functioning properly in a person who requires dialysis
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