What is the main function of a semipermeable membrane in dialysis?
Answer and explanation
Correct answer: To allow small wastes to pass out and stop large cells
The governing concept is selective diffusion through a semipermeable membrane. In dialysis, blood is placed next to a dialysis fluid that lacks, or contains very little, urea and other wastes. Small waste molecules diffuse across the membrane down their concentration gradient. Blood cells and many large plasma proteins are retained because they cannot cross the membrane readily. Therefore option A is correct; the other choices describe impossible conversions.
Frequently asked questions
What is the correct answer to this question?
To allow small wastes to pass out and stop large cells
Why is this the correct answer?
The governing concept is selective diffusion through a semipermeable membrane. In dialysis, blood is placed next to a dialysis fluid that lacks, or contains very little, urea and other wastes. Small waste molecules diffuse across the membrane down their concentration gradient. Blood cells and many large plasma proteins are retained because they cannot cross the membrane readily. Therefore option A is correct; the other choices describe impossible conversions.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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