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How does ADH act upon the glomeruli?
ADH (anti-diuretic hormone) acts on the glomeruli by increasing their permeability to water. This allows for water reabsorption from the glomerular filtrate back into the bloodstream, reducing urine volume and concentrating the urine.
What happened to the volume of urine as the solute concentration in the interstitial space increased?
As the solute concentration in the interstitial space increases, the volume of urine tends to decrease. This is because the kidneys reabsorb more water from the filtrate to help maintain the body's fluid and solute balance.
What would happen to total glomerular filtration and urine production in a human kidney if all the collecting ducts were blocked?
Total glomerular filtration would decrease due to the blockage of the collecting ducts, leading to reduced urine production. This blockage would prevent the reabsorption of water and solutes from the tubular fluid, resulting in a higher concentration of solutes in the urine that is formed.
What is glomerular hydrostic pressure?
Glomerular hydrostatic pressure is the pressure exerted by the blood within the glomerular capillaries of the kidney. It is a driving force for the filtration of blood to form urine. An appropriate balance of glomerular hydrostatic pressure is important for proper kidney function.
Why is K plus more concentrated in the urine then filtrate?
K+ is actively reabsorbed in the kidney tubules, particularly in the distal convoluted tubule and collecting duct, through the action of specific transporters. This results in a higher concentration of K+ in the urine compared to the initial filtrate. Additionally, changes in K+ levels help regulate important physiological processes such as maintaining fluid and electrolyte balance, nerve function, and muscle contraction.
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 less glomerular filtrate is formed what kind of urine is formed?
less urine is formed
Difference between filtrate and urine?
Until the liquid reaches the renal pelvis, it is "glomerular filtrate," when it reaches the pelvis, it is called "urine"
What is used to form urine and requires a high blood pressure?
Glomerular filtrate
What percent of the glomerular filtrate is reabsorbed?
the nephrons produce approx 150 litres of glomerular filtrate per day 99% of which is reabsorbed to leave an average of 1.5litres of urine.
Glucose is found in glomerular filtrate but NOT in the urine because?
glucose is transported back into the bloodstream
Why is there protein in the glomerular filtrate and urine?
The inflammation would increase the permeability of your glomeruli. This retraction of the epithelium will allow the larger protein molecules to go through the filtrate.
What happens to the glomerular filtrate as it passes to the ureter?
As the glomerular filtrate passes through the renal tubules, it undergoes reabsorption of water, ions, and nutrients back into the bloodstream. Waste products and excess substances that were not reabsorbed are left behind and eventually become urine. The final urine then passes through the ureter into the bladder for storage and eventual elimination.
What is glomerular filtrate?
Glomerular filtration rate is the rate at which fluid is filtered by the kidneys. The normal rate for humans is 125mL/min or 180L/day. The fluid that is filtered (and not reabsorbed later) is excreted as urine.
Why is glucose present in the glomerular filtrate but absent in the urine?
Glucose is absorbed in the nephron of the kidney, if it is present in very high amounts or unable to be reabsorbed, like with diabetes, it will be present in urine.
Which substances present in the glomerular filtrate but not normally in urine?
glucose and amino acids, because they are selectively reabsorbed in the proximal convoluted tubule.
What happens with an increase in the solute concentration of the filtrate in the lumen of the nephron tubules?
An increase in the solute concentration of the filtrate leads to an increase in osmotic pressure in the nephron tubules. This triggers more water reabsorption from the filtrate, reducing urine volume and maintaining overall body fluid balance.
