Human urine is salty. Eating sweet stuff does not make urine sweet, so that generally means sugars are excreted the other route. Or metabolized into energy for our cells. But where in our body are salts and sugars separated?
Salt is absorbed in the small intestines with water, goes to blood vessel, then to kidneys.
Sugars are metabolized, broken down smaller, then absorbed into blood vessels in small intestines too.
Both salt and sugar go into kidneys from blood vessels. Then, there is a reabsorption process, where sugar is reabsorbed back into the blood vessels (if this did not happen, we would quickly slip into a coma). If there is already too much sugar, then some of it is excreted, like for diabetes where urine can be a little sweet. But I'm confused about salt, I'm hearing salt is also reabsorbed back into kidneys, or and salt is urinated out? Then what happens to the sugar the 2nd time it goes into the blood vessels, from the kidneys? Thanks.
The ultimate target for sugar (glucose) are all cells which are using it as energy source. It is taken up via various glucose transporters, of which some are insulin dependent. In the kidneys, glucose is re-absorbed from the primary filtrate in an active process.
For salts, there are also dedicated mechanisms to maintain homeostasis via regulated transporters.
Wolfgang Schechinger yes, after the 2nd time glucose goes into the blood, from the kidneys, it is broken down into pyruvate. What % of glucose is turned into pyruvate, and what is the fate of pyruvate, does it eventually get urinated out?
from mouth to kidney, the way is long, every components have time to be ingested in intestines, by the body or by the bacterials, in muscles, in liver...so that at the end some characteristics may miss. and in addition, some components are part of sheet, sorry.
all the best for this new year
fred
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