I don’t know how to **properly** search this up on Google (i know how to type into the search bar and press enter and all that) so the answers I’ve been getting are about stomach acid dilution. My question is how does what we drink end up in our bladders if it goes into our stomachs first? Like, does stomach acid come into the mix and if not, how does our body know not to put stomach acid in our bladders? What path does it follow once it enters the stomach? I only know of the solids exit. How is the water separated from the acid if it is? If you drank enough would you just have an increased amount of acid? I don’t know anything about drinking except it goes into our stomachs, and somehow exits the bladder somewhere between clear or dark yellow depending on how healthy you’ve been with your choices of beverages.
Edit: clarification
In: Biology
The stomach content, including all the water and acid, is regularly emptied into the intestines through a 3mm hole in the stomach.
Water and stomach acid are chemically different, water being H2O and stomach acid HCl. As they enter the intestines the stomach acid is neutralized by bases excreted by the intestines and the pancreas. Meanwhile, the water molecules pass through small pores in the intestinal cells called aquaporins, which only water can pass through. After leaving the intestines, the water passes into the blood.
A large portion of your blood is pumped to the kidneys. The kidneys are extremely good at choosing what liquids and molecules stay inside the blood, and whatever the kidneys extract is peed out as urine.
One of the kidneys’ most important function is maintaining a good blood volume by increasing or decreasing their extraction of water out of the blood (more water removed = less blood in your circulation). The more water they extract, the more diluted the urine is, making it more clear.
Contrary to popular belief, the urine’s color isn’t caused by what we drink. Rather, it is our body’s natural break down of red blood cells that taints our poop brown and our pee yellow. The more we drink, the more water our kidneys extract, and the more diluted our urine becomes (and vice versa).
As long as you’re not elderly or have dysfunctioning kidneys, you should not worry about how clear or yellow your pee is. The key is instead to make sure you drink whenever you feel thirsty, since this is your brain’s way of telling you that your body needs more water (the brain continously monitors this). Conversely, whatever water you drink when you already have enough, you pee out.
Latest Answers