which substance is completely reabsorbed in the blood?
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Reabsorption. Reabsorption takes place mainly in the proximal convoluted tubule of the nephron . Nearly all of the water, glucose, potassium, and amino acids lost during glomerular filtration reenter the blood from the renal tubules.
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Reabsorption of water is hormonally controlled. Most of the water passing through the kidney is eliminated as urine. Normal filtrate contains a large amount of protein. The excretion of sodium ions is one of the mechanisms that maintains the pH balance of the blood.
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Support your answer with observations of what is present in the nephron cup. Obviously you can't afford to lose large amounts of water, salt, glucose, and amino acids in your urine! So a second process, called reabsorption, moves essential materials from the nephron back into the blood.
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Red blood cells, white blood cells, protein, glucose and amino acids should be kept in the blood. These components should not be present in urine.
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In the human body, blood plasma is an example of a homogeneous mixture. The colorless fluid holds blood cells in suspension. It makes up a little more than half of the volume of human blood. ... These are dissolved throughout the water, so the mixture presents in the same phase and is homogeneous.
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Plasma, leaving blood capillaries is called interstitial fluid and is reabsorbed into the lymphatic capillaries, where it is referred to as lymph. The lymph is is then carried to into lymphatic vesselsd called lymph ducts, where it is filtered through lymph nodes.
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Substances normally found in urine are nitrogenous wastes, water, various ions (always including sodium and potassium). Substances normally absent from urine include glucose, blood proteins, blood, pus (WBCs), and bile.
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A liquid called plasma makes up about half of the content of blood. Plasma contains proteins that help blood to clot, transport substances through the blood, and perform other functions. Blood plasma also contains glucose and other dissolved nutrients. Blood is conducted through blood vessels (arteries and veins).
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Two substances which are selectively reabsorbed from the tubules of a nephron are Amino acids and Glucose.
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By the time the filtrate has reached the mid part of the proximal tubule, 100% of the filtered glucose and amino acids have been reabsorbed, and large amounts of sodium, bicarbonate, phosphate, lactate, and citrate ions.
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Blood brings oxygen and nutrients to all the parts of the body so they can keep working. Blood carries carbon dioxide and other waste materials to the lungs, kidneys, and digestive system to be removed from the body. Blood also fights infections, and carries hormones around the body.
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It is absorbed poorly by skin contact unless the skin is damaged. Studies with workers and rats showed that boric acid can also be absorbed if inhaled. However, it is not clear how much is directly absorbed in the lungs and how much is cleared from the lungs and swallowed.
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In humans, blood is an opaque red fluid, freely flowing but denser and more viscous than water. The characteristic colour is imparted by hemoglobin, a unique iron-containing protein. Hemoglobin brightens in colour when saturated with oxygen (oxyhemoglobin) and darkens when oxygen is removed (deoxyhemoglobin).
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Red blood cells contain a substance called haemoglobin, which transports oxygen around the body. The amount of oxygen that's delivered to your body's tissues depends on the number of red blood cells you have and how well they work. A RBC count is usually carried out as part of a full blood cell (FBC) count.
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Reabsorption takes place mainly in the proximal convoluted tubule of the nephron . Nearly all of the water, glucose, potassium, and amino acids lost during glomerular filtration reenter the blood from the renal tubules.
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The blood plasma volume totals of 2.7–3.0 liters (2.8–3.2 quarts) in an average human. It is essentially an aqueous solution containing 92% water, 8% blood plasma proteins, and trace amounts of other materials.
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Answer: Amino acids and gluconate are selectively reabsorbed during filtration of urine by nephrons.