glucose and amino acids, because they are selectively reabsorbed in the proximal convoluted tubule.
Urea.
Not normally - red blood cells are quite large and should be above the glomerular filtration size threshold. Blood in the renal filtrate will by default result in blood in the urine due to an inability of the kidney to reabsorb it and this is pathlogic.
Glucose is absorbed in the nephron of the kidney, if it is present in very high amounts or unable to be reabsorbed, like with diabetes, it will be present in urine.
. Since proteins are very large molecules (macromolecules), they are not normally present in measurable amounts in the glomerular filtrate or in the urine. The detection of protein in urine, called proteinuria may indicate that the permeabilityof the glomerulus is abnormally increased. This may be caused by renal infections or it may be caused by other diseases that have secondarily affected the kidneys such as diabetes mellitus, jaundice, or hyperthyroidism.
Blood, proteins, and sugars are absent from the filtrate and urine of a healthy adult. If any of these are present it is a sign that something is not right and should be addressed right away.
Undigested food, largely cellulose, some water and bacteria are normally present in faeces.
Interference with the brain's carefully regulated chemical environment may cause damaging amounts of normally present substances (carbon dioxide, potassium) to accumulate.
Substances that are present before the reaction are called "reactants" or "reagents".
Substances that are present before the reaction are called "reactants" or "reagents".
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All reactants and products are present at equilibrium.
The substances that are present when a chemical reaction begins are reactants, at the end of the reaction they form products.
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