Why does urea increase in blood when kidneys fail?
Answer and explanation
Correct answer: Kidneys cannot remove urea from blood properly
The governing concept is excretion of nitrogenous waste. During protein metabolism, the liver forms urea from toxic ammonia. Healthy kidneys filter urea from the blood and eliminate it in urine. If kidney function fails, filtration and removal decline, so urea accumulates in the bloodstream, a condition associated with harmful waste buildup. Option A is correct; the lungs, heart, and stomach do not perform this renal excretory role.
Frequently asked questions
What is the correct answer to this question?
Kidneys cannot remove urea from blood properly
Why is this the correct answer?
The governing concept is excretion of nitrogenous waste. During protein metabolism, the liver forms urea from toxic ammonia. Healthy kidneys filter urea from the blood and eliminate it in urine. If kidney function fails, filtration and removal decline, so urea accumulates in the bloodstream, a condition associated with harmful waste buildup. Option A is correct; the lungs, heart, and stomach do not perform this renal excretory role.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
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