The function of the mammalian kidney is to excrete
A
extra salts, urea and excess water
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B
extra urea, excess water and excess amino acids
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C
extra urea, extra carbohydrates and extra water
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D
extra urea, extra salts and extra sugar
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Solution
The correct option is A
extra salts, urea and excess water
The kidneys remove from the blood the nitrogenous wastes such as urea, as well as salts and excess water, and excrete them in the form of urine. This is done with the help of millions of nephrons present in the kidney. The filtrated blood is carried away from the kidneys by the renal vein.