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Answer:
a) i) Blood in the first part of filtration, gets collected in the cup shaped Bowman's capusle via the glomerulus where the initial filtrate flows through a long narrow tube.
ii) As this initial filtrate flows along this tube, it contains some amounts of amino acids, glucose, salts and water which is selectively reabsorbed as it flows.
iii) After reabsorption is completed, the final product (urine) is useless and flows out of the nephron through the tube which unites to the ureter to be stored in the urinary bladder.
b) They take place in A.
c) Nitrogenous waste in humans are urea which is excreted out the body either in the form of urine or sweat.
d) The amount of urine produced depends on the amount of water reabsorbed in the nephrons. Amount of water reabsorbed in the nephrons depends upon the amount of excess water there is in the body and how much waste is to be excreted.
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