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The substance that is both filtered and actively reabsorbed and secreted is typically a type of ion or solute, such as potassium (K+) in the kidneys. During renal function, potassium is filtered out of the blood in the glomerulus, then actively reabsorbed in the proximal tubule and loop of Henle, and finally actively secreted in the distal tubule and collecting duct. This dual process helps regulate potassium levels in the body, maintaining homeostasis.
What else can I help you with?
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?
Isotonic- 300 mOsm Per Pearson Yes, the osmolarity of the filtrate would be about 300 mOsm because both solutes and water are reabsorbed in the proximal tubule. As particles are reabsorbed, water follows osmotically.
Where are water and salt reabsorbed back into the bloodstream?
Water and salt are primarily reabsorbed back into the bloodstream in the kidneys, specifically in the renal tubules. The proximal convoluted tubule reabsorbs a significant amount of both water and sodium. Additionally, in the loop of Henle, the descending limb is permeable to water, while the ascending limb actively reabsorbs sodium and chloride without allowing water to pass. This reabsorption process is crucial for maintaining fluid and electrolyte balance in the body.
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?
because glucose and other nutrients are small to filtrate through the filtration membrane and glucose is essential to be in the filtration membrane.
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.
Can A Pivot Table be sorted and filtered?
Yes, you can both sort and filter a pivot table.
