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Urea is reabsorbed in the proximal convoluted tubule (PCT) of the nephron through both paracellular and transcellular pathways. The high water permeability and abundant transporters in the PCT facilitate the reabsorption of urea. If there is an increase in urea concentration in the filtrate, more urea will be reabsorbed passively and actively in the PCT to maintain urea balance in the body.
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What would happen to the intracellular and extracellular concentration of urea if the kidney stopped functioning?
If the kidney stopped functioning, the intracellular concentration of urea would increase due to impaired excretion. In contrast, the extracellular concentration of urea would also increase due to the diminished clearance of urea from the blood.
Why is the concentration of urea strong in urine?
The concentration of urea is high in urine because urea is a waste product produced by the liver when it breaks down proteins. The kidneys then filter urea from the blood and excrete it in urine to maintain the body's nitrogen balance.
Which structure contains the lowest concentration of urea?
The structure that contains the lowest concentration of urea is typically the renal cortex of the kidney. In the nephron, as filtrate passes through the renal corpuscle and into the proximal convoluted tubule, a significant amount of urea is reabsorbed, leading to lower concentrations in these areas compared to the medulla and collecting ducts, where urea concentration increases due to water reabsorption.
Why the concentration of urea in urine is higher than the concentration of urea in the filtrate?
The concentration of urea in urine is higher than in the filtrate due to the processes of reabsorption and secretion that occur during kidney function. As the filtrate passes through the renal tubules, water and various solutes are reabsorbed back into the bloodstream, concentrating the remaining substances, including urea. Additionally, urea can be secreted into the tubules from the blood, further increasing its concentration in the urine. This selective reabsorption and secretion ensure that waste products are efficiently excreted while conserving necessary substances.
Why urea can't cross membranes?
Passive diffusion - Urea has its own concentration gradient so it will go from an area of high concentration through the cell membrane into an area of lower concentration.
What substance found in greater concentration in renal vein then in renal artey?
The substance found in greater concentration in the renal vein than in the renal artery is urea. Urea is a waste product formed from the breakdown of proteins and is produced in higher amounts in the liver. During the process of filtration and reabsorption in the kidneys, urea is excreted into the urine, leading to its increased concentration in the renal vein as it returns to circulation after filtration.
How does dehydration cause an increase In urea levels?
Dehydration leads to a decreased volume of water in the body, resulting in concentrated blood plasma and higher levels of solutes, including urea. The kidneys respond to dehydration by conserving water, which inadvertently elevates the concentration of urea in the blood as the kidneys reabsorb water while excreting waste. Consequently, this increased concentration of urea can be measured as elevated urea levels in the bloodstream, indicating potential kidney function issues or dehydration.
Why is it important that the concentration of urea is kept very low in the dialysis fluid?
the concentration of urea should be kept low in the dialysis fluid because urea is harmful for our body if it is not removed.
What would happen to the intracellular and extracellular concentration of urea if the kidney stopped functioning?
If the kidney stopped functioning, the intracellular concentration of urea would increase due to impaired excretion. In contrast, the extracellular concentration of urea would also increase due to the diminished clearance of urea from the blood.
Why is the concentration of urea strong in urine?
The concentration of urea is high in urine because urea is a waste product produced by the liver when it breaks down proteins. The kidneys then filter urea from the blood and excrete it in urine to maintain the body's nitrogen balance.
What is found in the highest concentration of urine?
urea
What is found in the highest concentration in the urine?
urea
What carries blood with high concentration of urea?
the blood plasma carries waste products, including urea.
Which structure contains the lowest concentration of urea?
The structure that contains the lowest concentration of urea is typically the renal cortex of the kidney. In the nephron, as filtrate passes through the renal corpuscle and into the proximal convoluted tubule, a significant amount of urea is reabsorbed, leading to lower concentrations in these areas compared to the medulla and collecting ducts, where urea concentration increases due to water reabsorption.
Why the concentration of urea in urine is higher than the concentration of urea in the filtrate?
The concentration of urea in urine is higher than in the filtrate due to the processes of reabsorption and secretion that occur during kidney function. As the filtrate passes through the renal tubules, water and various solutes are reabsorbed back into the bloodstream, concentrating the remaining substances, including urea. Additionally, urea can be secreted into the tubules from the blood, further increasing its concentration in the urine. This selective reabsorption and secretion ensure that waste products are efficiently excreted while conserving necessary substances.
Why urea can't cross membranes?
Passive diffusion - Urea has its own concentration gradient so it will go from an area of high concentration through the cell membrane into an area of lower concentration.
What process reduces the concentration of urea in the blood of humans?
Urination
