Kidneys help in the conservation of useful materials and excretion of – McqOptions

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1.	Kidneys help in the conservation of useful materials and excretion of wastes and therefore they receive 20% of the heart's output of blood (as much as the heart and brain combined). On a percentage basis, which substance is most completely reabsorbed by the kidneys?
A.	Water
B.	Glucose
C.	Urea
D.	Sodium
Answer» C. Urea

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