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Kidneys are reddish brown, bean-shaped structures situated between the levels of _____ thoracic and _____ lumbar vertebrae.
(a)
(b)
(c)
(d)

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Important Questions on Excretory Products and Their Elimination
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On an average, how much urea is excreted out per day by an adult human?

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An adult human excretes, on an average _____ litres of urine per day.

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All are performed in a nephron, except

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Which is the first step of urine formation?

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What is the osmolarity of the filtrate at the hairpin bend of loop of Henle in a human?

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Nearly all of the essential nutrients and of electrolytes and water are reabsorbed in the:

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Which of the following component of blood is not a part of nephric filtrate?

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The main function of loop of Henle is
