what are the three stages of urine formation and where do they occur?
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Filtration, Reabsorption, Secretion: The Three Steps of Urine Formation. The kidneys filter unwanted substances from the blood and produce urine to excrete them. There are three main steps of urine formation: glomerular filtration, reabsorption, and secretion.
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['a need to urinate on a more frequent basis.', 'sudden urges to urinate.', 'a burning sensation when passing urine.']
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Casts. Urine casts are cylindric molds of the kidney tubules, formed of aggregated proteins or cells within the tubules and then passed into the urine, where they can be seen on microscopic exam. Urine from normal animals contains only a few hyaline casts (2 or less/lpf) or granular (1 or less/lpf).
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A urinalysis, also called a urine test, can detect the presence of nitrites in the urine. Normal urine contains chemicals called nitrates. If bacteria enter the urinary tract, nitrates can turn into different, similarly named chemicals called nitrites. Nitrites in urine may be a sign of a urinary tract infection (UTI).
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Urine Is 95% Water The nephrons of the kidneys process blood and create urine through a process of filtration, reabsorption, and secretion.
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Components of the Urinary System. The urinary system consists of the kidneys, ureters, urinary bladder, and urethra. The kidneys form the urine and account for the other functions attributed to the urinary system.
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['A Nephron.', 'The Glomerulus.', 'Proximal Convoluted Tubule.', 'The Loop of Henle.', 'Distal Convoluted Tubule and Collecting Duct.']
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Urine is a liquid waste material produced in and excreted by the body. Secreted by the renal tubules, it accumulates in the urinary bladder and is excreted via the urethra. While it is composed of 91 to 96 percent water, it contains many other components, both solid and liquid.
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UTIs occur when the urinary tract becomes infected, usually by bacteria. In most cases, bacteria from the gut enter the urinary tract through the urethra. This may occur when wiping your bottom or having sex, for example, but often it's not clear why it happens.
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The nephron uses four mechanisms to convert blood into urine: filtration, reabsorption, secretion, and excretion. These apply to numerous substances.
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The urine travels from the kidneys to the bladder in two thin tubes called ureters. The ureters are about 8 to 10 inches long. Muscles in the ureter walls tighten and relax to force urine down and away from the kidneys. Small amounts of urine flow from the ureters into the bladder about every 10 to 15 seconds.
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Introduction to the Female Urogenital System When urine is formed, tubes called ureters transport it to the urinary bladder, where it is stored and excreted via the urethra. The uterus or womb is the major female reproductive organ, which supports and nourishes the developing baby.
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['Calcium stones are the most common type of kidney stones. ... ', 'Uric acid stones form when your urine is often too acidic. ... ', 'Struvite stones can happen when you have certain types of urinary tract infections in which bacteria make ammonia that builds up in your urine.']
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Rarely, stones may form in the bladder. While kidney stones can occur at any age, even in premature infants, most occur in teens, with teen girls having the highest incidence.
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Kidney stones form when your urine contains more crystal-forming substances — such as calcium, oxalate and uric acid — than the fluid in your urine can dilute. At the same time, your urine may lack substances that prevent crystals from sticking together, creating an ideal environment for kidney stones to form.
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['The Filtration Membrane Keeps Blood Cells and Large Proteins in the Bloodstream. ... ', 'Reabsorption Moves Nutrients and Water Back into the Bloodstream. ... ', 'Waste Ions and Hydrogen Ions Secreted from the Blood Complete the Formation of Urine.']
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Kidney stones are usually formed following a build-up of certain chemicals in the body. Certain medical conditions can lead to an unusually high level of these chemicals in your pee. You're also more likely to develop kidney stones if you do not drink enough water and other fluids.