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How is urea reabsorbed?
40-50 % of filtered urea is reabsorbed through passive diffusion in the Proximal Convoluted Tubules. Loop of Henle, Distal Convoluted Tubules and Cortical Collecting Ducts are impermeable to urea. But secretion of urea happens in descending Loop of Henle (This helps to maintain the osmotic gradient in the medulla of the Kidney). There is also re-absorption of urea in the medullary collecting ducts.
Does diuretics work on the collecting ducts?
Diuretics work in the region of the collecting ducts, but on the ducts themselves. They inhibit ADH from causing water to be reabsorbed in the distal tubules and that produces more urine output.
Where does ADH act on the nephron?
collecting duct (system) and late distal tubule
What does ADH make the kidneys do?
Increases how much water the collecting ducts in the kidney reabsorb.
What kind of filtered materials are reabsorbed by the blood In the kidneys?
mainly glucose (in the renal tubule) and water (in the collecting duct)
How would problems in the collecting ducts of the nephrons cause kidney failure?
The collecting ducts are a series of small tubes inside the kidneys that funnel urine into therenal pelvis for drainage into the ureter. Once in the ureter, the urine can be pushed into the bladder for elimination. The structure of the kidneys is quite complex and includes a large number of these tubes in an interconnected drainage system. People with urinary tract disorders can potentially develop problems along part of the collecting ducts, and a kidney collecting duct issue can cause symptoms like difficulty urinating and edema.
What Substances is not reabsorbed by blood after it passes through the kidneys?
wastes
What is the function of the urteres?
The ureters are the collecting ducts for urine in the kidneys that transport urine to the bladder.
Is water reabsorbed or excreted through the urine?
Water (e.g. a mixture of fluid) is excreted through the urine.Fluids are reabsorbed from the large intestines and then shuttled to the kidneys. The kidneys process fluids for excretion.
The site at which ADH is most active?
collecting ducts
Which structures drains into the collecting ducts?
Loop of henle
What makes collecting ducts permeable to water?
yes
