0
Why do substances filtered out by the kidneys need to reabsorbed?
Wiki User
∙ 12y agoWant this question answered?
Be notified when an answer is posted
Add your answer:
Earn +20 pts
How does urine differ from the original filtrate?
From the original filtrate, a lot of much needed electrolytes (Sodium e.t.c) are reabsorbed (absorbed back into blood), a few substances secreted further into the urine, then loads of water reabsorbed to fine tune body water to exactly how much you need(as much as possible), making urine far more concentrated than the original filtrate.
Does the particles in colloids filter?
It depends on the colloid, really. If there are solid particles in the colloid, then they can be filtered. But you would need an extremely fine filter to be able to do so. In the case that the particles are liquid, then the answer would be no.
Why isn't urine the color of what you eat or drink?
Bascically, the urine that exits your body is made up (mostly) by water, and a toxin called urea. Your kidneys filter the blood to get rid of the dangerous substances from food, and this collective toxins is the aforementioned urea. It is then mixed with water for expulsion. All the food in your body is the same colour, it is all broken down by acids and absorbed into the blood, which is cleaned and then the toxins expelled. Basically your urine isn't leftover food like excrement, its just small bits of it that are not good for you. TheWillyAnswerThis is because urine is a substance manufactured in the kidneys, and always has a similar composition no matter what you drink or eat. Occasionally some foodstuff in sufficient quantity can slightly change urine's colour, as can some medical conditions (such as porphyria which colours it purple) but in normal conditions uring contains the same substances, the only difference being in the concentration of the urine. If you drink a great deal, then the soluble materials (eg the malt etc in beer) are absorbed by the intestines whilst some of the excess water which the body does not need finds its way into the bloodstream and then to the kidneys making the urine more dilute. In warm weather when you sweat a lot, losing water, or when you have not drunk anything for a long while, the urine is darker in colour, as it is more concentrated, but it still contains the same substances. Normal urine consists mostly of water, but there are other substances that the body does not need, and which may be toxic to the body if they remained, such as nitrogenous waste. One such substance is urea, a chemical that is produced by the kidneys, which contains nitrogen in a form that, if it remained in the body would slowly poison the body. If the kidneys stop working then the only option is dialysis, where the blood is filtered to remove this nitrogenous waste. Failure to do this would result in death through poisoning, so your kidneys provide a vital function not only in keeping you healthy, but actually in keeping you alive.
What substances does the body need to carry out cellular respiration?
Oxygen
Why renal is more sensitive to hypotension?
Renal means related to kidneys. Kidneys are very sensitive to hypotension. That is to low blood pressure. Kidneys have to wash out the waste products of protein metabolism. They are very much toxic to the brain. Your kidneys are very small in size, but still get very heavy blood supply. Kidneys filter out about 180 litres of fluid per day. That is the need of the hour. In case of hypotension, this function will be adversely affected. So kidneys secrete the hormone to maintain the blood pressure.
What are some of the substances filtered from the blood by the kidney?
substances that are excreted from the kidneys are urea, uric acid, creatinine, toxins, drugs, plasma inorganic ions,(Na+,K+,Ca2+..ect.) H+, HCO3-, of course H2O, and anything else the body doesn't need that's found in the blood plasma. substances that are reabsorbed are amino acids, proteins, glucose, water, plasma inorganic ions and anything the body needs that is found in the blood plasma. the nephrons are nonselective and secrete everything in the plasma, and the capillaries then reabsorb the vitamins minerals nutrients ect. that the body needs back into the blood, everything the body doesnt need goes to the bladder. What will cause the kidneys to lose more water from the blood? Diuretic hormones
Why might someone need diyalisis?
if someone's kidneys have failed so they need their blood filtered.
Why would damaged kidneys effect your health?
Your kidneys act as a 'filter' - removing toxic substances from the body. If your kidneys are damaged, their functionality is reduced, and you will need dialysis treatment.
Why do people need kidneys?
Kidneys make urine by filtering blood. If the blood were not filtered, harmful chemicals would remain in the blood, causing jaundice and eventually killing you. People whose kindeys don't work or don't work right need to undergo dialysis, artificial filtering of the blood, several times per week until they receive a donated kidney.
Does the respiratory system remove waste?
Yes, the respiratory system removes waste. Besides providing oxygen to the lung and the cells of a body during inhalation, they also provide some nutrients as well. Therefore when a person is exhaling, carbon dioxide is picked up from the cells along with waste (unused or used nutrients) and is breathed out.
How does urine differ from the original filtrate?
From the original filtrate, a lot of much needed electrolytes (Sodium e.t.c) are reabsorbed (absorbed back into blood), a few substances secreted further into the urine, then loads of water reabsorbed to fine tune body water to exactly how much you need(as much as possible), making urine far more concentrated than the original filtrate.
What are the parts of the kidney and what are their functions?
Kidneys filter your blood of toxins and foreign, unwanted substances. It's really cool that you only need one to survive. :)nephrons,glomerulus,ureter
What are the functions of the liver and the kidneys?
The heart's function is to pump the blood to the rest of the body. The function of kidney is to filter the blood to get rid of waste materials to be disposed of in urine. The function of liver is to store carbohydrates in the form of glycogen and detoxify toxins.
How much blood does the heart filter a day?
No. The heart undergoes cleaning in the Kidney. In the kidney the blood is filtered and re-filtered many times to remove most impurities that the blood does not need. Research the kidney and you will get your answer! All the heart does is pump the blood around the body! Hope this helps!
How do horses kidneys work?
Horses are big animals, but their kidneys work in the same way as other kidneys work. The kidneys work by filtering out what the body does not need.
Why do amphibians need kidneys?
Yes, they do.
How do the kidneys help the circulatory system?
The circulatory system helps by pumping oxygen rich blood to the rest of the body (from the heart), being a source of travel for the blood so it can reach all parts of the body (blood vessels), removing carbon dioxide and other wastes from the cells in the body via the blood, and providing the various cells in the body with oxygen so that they can carry out various cell processes, such as cellular respiration, which keep a living organism alive. Without oxygen, and a means to be rid of carbon dioxide and wastes, humans and other organisms would not be able to survive.
