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Plasma proteins and red blood cells are not excreted in urine because they remain in the blood when it is filtered through the kidneys and into the ureters. They are too big to be filtered. Most other substances present in blood are also present in urine since the kidneys filter out poisonous substances as well as substances that are present in excess such as salt and water.
Blood in the urine may be hematuria (also spelled haematuria) or hemoglobinuria.
Emboli may also damage the kidneys, causing blood to appear in the urine
Blood removes wastes from the body through the kidneys, which filter waste products from the blood and eliminate them in the form of urine. Additionally, the liver also plays a role in removing toxins and waste products from the blood.
Blood in urine, also known as hematuria, can occur when there is bleeding in the urinary tract. This can be caused by various factors such as urinary tract infections, kidney stones, trauma, or underlying medical conditions like kidney disease or cancer. It is important to consult a healthcare provider for proper diagnosis and treatment if blood in urine is present.
When blood glucose levels are high in a diabetic person, the kidneys may not be able to reabsorb all the glucose, leading to glucose spilling into the urine (glucosuria). Glucose carriers, such as SGLT2 in the kidney tubules, may become saturated, causing excess glucose to be excreted in the urine. This can be an indication of uncontrolled diabetes and a mechanism for reducing high blood glucose levels.
Compounds found in urine that are typically not present in glomerular filtrate include urea, creatinine, uric acid, and various metabolites. These substances result from metabolic processes and are actively secreted or concentrated by the renal tubules after the initial filtration of blood. Additionally, certain hormones and excess electrolytes may also be present in urine but not in the filtrate.
Blood in the urine, also known as hematuria, can be caused by various factors such as urinary tract infections, kidney stones, or more serious conditions like kidney disease or bladder cancer. It is important to consult a healthcare provider for proper diagnosis and treatment.
Blood in the urine can have several causes:InfectionInjuryKidney stonesCancerBlockageCancerBlood clotting issuesMedicationsThere are also certain food dyes and chemicals that can cause discoloration of the urine. Urine staining can also be a sign of liver issues, even though it is not actually blood that you are seeing. Your best bet is to go to the doctor to have it checked out.
Urine typically does not contain significant amounts of large proteins, red blood cells, or white blood cells under normal conditions. Additionally, it is generally free from glucose and ketones, unless there is a specific metabolic condition present. Other components, such as bacteria and certain drugs, may also be absent depending on an individual's health and circumstances.
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