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Question

The blood constituents that remain unchanged in quantity, after circulating through the kidney are

A
Urea and glucose.
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B
Glucose and proteins.
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C
Urea and proteins.
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D
Urea and uric acid.
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Solution

The correct option is B Glucose and proteins.
Urine filtration takes place in nephrons of the kidney. The glomerulus is the part of the nephron that filters waste products from the blood. The waste products contain urea, uric acid, salts, etc. Proteins and blood cells are large molecules that cannot be filtered So they are completely retained in the blood plasma. Though the glucose in the filtrate is completely (100%) reabsorbed in the proximal convoluted tubule and is transported back to the blood.
So, the correct answer is option B.

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