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What is filtered and both actively reabsorbed and actively secreted?
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Which substance is both filtered and secreted by the nephron and is therefore used to measure the renal plasma flow and estimate the total renal blood flow?
Para-aminohippuric acid (PAH) is both filtered and actively secreted in the nephron. It is used to measure renal plasma flow and estimate total renal blood flow due to its ability to be completely extracted by the kidneys.
Why concentration of urea increased in PCT?
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.
Do kidneys have filtration and absorption properties?
Yes, the kidneys have both filtration and absorption properties. Filtration occurs in the glomerulus, where blood is filtered to remove waste products and excess substances. Absorption occurs in the renal tubules, where essential substances are reabsorbed back into the bloodstream.
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.
What is the osmolarity of the filtrate at the end of the proximal tubule?
The osmolarity of the filtrate at the end of the proximal tubule is approximately 300 mOsm/L, which is the same as the osmolarity of the interstitial fluid. This is because the proximal tubule is responsible for reabsorbing most of the filtered solutes and water, maintaining osmotic balance.
Is it better to drink filtered water or bottled water?
Both are OK
Can adrenaline and noradrenaline secreted at the same time?
No. Both work to lower eachother.
Is tap water better then bottled water for plants?
That depends if the tap water is filtered or not. Bottled water is filtered, and some tap water isn't, but if the tap water is filtered, then both kinds of water are the same healthiness to plants.
Why are useful molecules like glucose and other nutrients found in the filtrate along with urea and other wastes?
Glucose and other nutrients are essential for the body's functions, so they are filtered out of the blood to be reabsorbed by the body. Urea and other wastes are byproducts of metabolism that need to be removed from the body. Both types of molecules are filtered together in the kidneys to maintain a balance of nutrients and waste products in the body.
Speacking accurately or listening actively is important?
I would think to both speak and listen accurately would both be important.
Is sodium bicarbonate secreted by endocrine or exocrine glands?
Sodium bicarbonate is secreted by the pancreas. The pancreas has both endocrine and exocrine function. Its secretion of sodium bicarbonate is part of its exocrine function.
What happens as wastes are filtered in nephron?
first both wastes and needed materials,such as glucose,are filtered out of the blood.then,much of the needed material is returned to the blood,and the wastes are eliminated from the body
