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In which condition is dialysis useful?

Answer and explanation

Correct answer: When kidneys cannot filter blood properly

The governing concept is excretion: healthy kidneys filter the blood and remove nitrogenous wastes, excess salts, and water to form urine. If the kidneys fail to perform this function adequately, harmful wastes accumulate in the body. During dialysis, a machine passes the patient’s blood through a selectively permeable membrane, removes wastes and excess fluid, and returns the cleaned blood. Therefore, option A is correct; the other options describe digestion, breathing, or plant nutrition, not kidney failure.

Related tags

DialysisKidney-FailureExcretionBlood-FiltrationLife ProcessesWorld Of LivingScienceClass 10 Mcq

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