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Biology
Haemodialysis
Question

An artificial kidney contains a number of tubes with a ________ lining, suspended in the tank filled with dialysing fluid.
  1. Semi-permeable
  2. Permeable
  3. Impermeable
  4. Non-permeable

A
Permeable
B
Impermeable
C
Semi-permeable
D
Non-permeable
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Solution
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Artificial kidneys contain a number of tubes. Each tube contains a semi-permeable lining that remains suspended in a tank filled with a dialyzing fluid having the same osmotic pressure as blood. The patient's blood is passed through these tubes. Only selective products such as waste products (urea) pass through the semi-permeable membrane from the blood to the dialysing fluid. The purified blood is sent back into the patient's body.
So, the correct answer is option B.

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