Why is glucose present in blood plasma but not usually in urine?

Question

In a typical human

Answer 1

There is a renal threshold. If plasma glucose exceeds that level, then all of it cannot be reabsorbed in the renal tubules, and it appears in urine. That level is usually 180mg. per decilitre of blood.

Answer 2

Do you want to know metabolism of glucose inside the body ?

Glucose belongs to a class of foods called carbohydrates. It is the most abundant of the monosaccharides, which are the simplest carbohydrates. Because of its simple chemical structure, glucose can be absorbed directly into the blood from the intestine. Most complex carbohydrates, such as sucrose and starch, must be broken down into monosaccharides before they can be absorbed into the blood.

The blood normally is about 0.1 per cent glucose. After a meal rich in carbohydrates, the amount of glucose in the blood rises and remains higher than normal for a brief period. The extra glucose is rapidly removed from the blood and stored in the liver and muscles as a complex carbohydrate called glycogen. When quick energy is needed, stored glycogen is converted back into glucose. If the glycogen storage areas are full, excess glucose may be converted into fat.

In the disease diabetes mellitus, glucose is not efficiently used by the body cells, and the amount of glucose in the blood remains abnormally high. As the blood moves through the kidneys, some excess glucose passes into the urine. Urine is analyzed for the presence of glucose as a test for diabetes mellitus.

Happy Thanks Giving !

Answer 3

When blood sugar level exceeds 180 mg/dL (10 mmol/L), kidney begins to secrete sugar(glucose) along with urine. There will be slight variation in the blood sugar level in respect of each individual when the same is secreted by the kidneys.
Please see the webpages for more details on Glucosuria.

Answer 4

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Answer 5

Because there's a abundant supply in your muscles along with your pancreas that is suppose to be there. If it's in your urine that's a sign of an illness or some type of metabolic disease.

Answer 6

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