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Anti-diuretic hormone (ADH) causes water to be absorbed from the urine back into the body. Everything else in the urine, including electrolytes such as potassium, is concentrated.

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How does ADH affect the concentration of potassium in urine?

ADH, or antidiuretic hormone, increases water reabsorption in the kidneys, leading to more concentrated urine. As water is reabsorbed, the concentration of solutes in the urine, including potassium, increases. Therefore, ADH indirectly affects the concentration of potassium in urine by influencing the overall concentration of solutes.


Why drugs may affect urine concentration?

Drugs may affect urine concentration because it can make your urine a destorted colour and the production will come out more darker and inefficent.


What is the effect of antidiuretic hormone on potassium concentration and excretion?

Antidiuretic hormone (ADH) decreases the amount of sodium in your body and when ever sodium levels go down potassium levels go up (same is true for visa versa) so the amount of Potassium should increase when there is an increase in ADH.


How is the calculation of potassium from a 24 hour urine collection done?

To calculate the amount of potassium excreted in a 24-hour urine collection, you multiply the potassium concentration in the urine sample by the total volume of urine collected over the 24-hour period. This will give you the total amount of potassium excreted in that time frame.


What causes the concentration of urea to be higher in the urine than in the filtrate?

During reabsoption most of the water exits the nephron and enters the interstitial fluid. This increases the concentration of ions such as potassium in the nephron. In the collecting duct (at the very end) very little water is left and the concentration of potassium, sodium, etc ions rises (including urea). This is why urine is acidic.


Why does the concentration of potassium change in the presence of ADH without a change in the excretion of potassium?

ADH makes the distal tubule and collecting duct more permiable to water so body will reabsorb more water from the filtrate. It does not require excretion of potassium because it is not reabsorbing sodium at the expense of losing potassium like the hormone aldosterone would in the same case.


What is the name for excretion of potassium in the urine?

The excretion of potassium in the urine is known as kaliuresis. This process helps regulate potassium levels in the body by removing excess potassium from the bloodstream.


Which would be in a greater relative concentration in the urine than in the glomerular filtrate?

Phosphate ions, sulfate ions, potassium ions, urea, uric acid, creatine.


When does glucose concentration in urine become zero?

The normal glucose concentration in urine ranges from 0 to 15 mg/dL. The glucose concentration in urine becomes zero when no glucose has spilled over into the urine.


What factor limits the maximum possible urine concentration?

The maximum urine concentration is limited by the osmotic gradient between the kidney tubules and the surrounding interstitium. The ability to concentrate urine depends on the proper functioning of the kidney's loop of Henle and collecting ducts to establish and maintain this osmotic gradient. Additionally, factors such as hydration status and certain medical conditions can also affect the maximum urine concentration.


What happens as the concentration gradient of the intersititial fluid increases?

As the concentration gradient of the interstitial fluid increases, substances have a higher tendency to diffuse from areas of higher concentration to areas of lower concentration. This can affect various physiological processes such as nutrient uptake, waste elimination, and overall cell function.


Does urine contain minerals and vitamins?

Yes urine can contain both minerals and vitamins. Certain vitamins taken in excess would be excreted through the urine. Certain minerals can be found in urine as well such as sodium, potassium, chloride, magnesium, and calcium.