O-LevelBiologyCoordination & Response5090/11 · May/June 2014 · Q191 Mark

Which process occurs in a kidney dialysis machine?

ALarge protein molecules are removed from the blood plasma.

BMaterials pass out of the blood down a concentration gradient.

COxygen is used up in removing materials from the blood.

DPressure forces dialysis fluid into the blood.

✓ Correct answer

B: Materials pass out of the blood down a concentration gradient.

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Topic: Coordination & Response, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, May/June 2014 Paper 1 Variant 1, question 19.

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