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Let's begin with an overview of urine formation. What exactly is urine? How can it be...

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Biology

Let's begin with an overview of urine formation. What exactly isurine? How can it be used as a diagnostic tool? What does urinefrom a healthy person contain? How can urine contents be used as anindicator of health or disease?

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4.2 Ratings (770 Votes)
URINE FORMATIONANOVERVIEWUrine is one of the bodys waste products It is primarilycomposed of water andurea AS Urea is a special nitrogenouswaste compound that the body must routinely remove Urine formationoccurs in the kidney in three stagesFiltrationReabsorptionSecretionFiltrationStage 1 The kidney isthe bodys blood filtering system Blood vessels visit thekidney and enter a special ball of capillaries called theglomerulusThe glomerulus is nestled within aregion of the kidney called the Bowmans CapsuleThis is where filtration occurs As blood is pushed through thetiny capillaries the highpressure forces some things to passthrough the capillary walls The walls act as a sieve or a filterTherefore it is calledfiltrationWater sugar saltsamino acids nitrogenous wastes and other tiny things enter thekidney as a substance called the filtrateCells and large blood proteins that cannot fit through remain inthe blood vessels The filtrate entering the kidney is likepreurineReabsorptionStage 2The filtrate enters the kidney in the proximal tubuleThis region of the kidney is special because many things can beremoved from the filtrate These    See Answer
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