O-LevelBiologyTransport in Humans5090/12 · Oct/Nov 2022 · Q201 Mark

What are two main functions of the kidneys?

Ato make toxins in the blood harmless and to remove excess salt in the blood

Bto remove excess salt in the blood and to remove urea from the blood plasma

Cto remove urea from the blood plasma and to convert glucose to glycogen

Dto convert glucose to glycogen and to make toxins in the blood harmless

✓ Correct answer

B: to remove excess salt in the blood and to remove urea from the blood plasma

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Topic: Transport in Humans, O-Level Biology (syllabus 5090). Multiple choice, 1 mark.
Source: O-Level Biology, Oct/Nov 2022 Paper 1 Variant 2, question 20.

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