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When may dialysis be needed?

Answer and explanation

Correct answer: When kidneys fail to remove wastes from blood

The governing concept is excretion: healthy kidneys filter the blood, remove nitrogenous wastes and excess water, and form urine. If kidney function becomes severely reduced, urea and other wastes can accumulate in the blood. Dialysis uses a semipermeable membrane and special fluid to remove these substances artificially. Therefore option A is correct; the other options describe unrelated normal or plant processes.

Related tags

DialysisKidney FailureExcretionLife ProcessesWorld Of LivingScienceClass 10 Mcq

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