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20 Cards in this Set
- Front
- Back
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filtration
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the movement of molecules from the blood plasma in the glomerulus to the Bowman’s capsule, the 1st part of a nephron.
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glomerulus
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Filtration is produced by pressure gradients across the __________ membrane.
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Filtrate
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________ is essentially the same composition as plasma, but lacking proteins.
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reabsorption
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movement of molecules from the nephron tubules back into the peritubular capillaries.
There were filtered out & they got back in |
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secretion
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movement of molecules from the peritubular capillaries into the nephron tubules.
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renal exchange process
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• Filtration – the movement of molecules from the blood plasma in the glomerulus to the Bowman’s capsule, the 1st part of a nephron.
• Filtration is produced by pressure gradients across the glomerulus membrane. • Filtrate is essentially the same composition as plasma, but lacking proteins. • Reabsorption – movement of molecules from the nephron tubules back into the peritubular capillaries. o There were filtered out & they got back in • Secretion – movement of molecules from the peritubular capillaries into the nephron tubules. (585) |
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GFR
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• The amount of filtrate produced at all the nephrons per minute. Equals about 125ml/min.
• 180 liters/day o How? There are 3 processes. Filtration is just 1 of them. • Urine volume – 1 to 1.5 liters/day • Why is so much filtrate produced? • A major nephron function is the removal of nitrogenous wasters, primarily urea from the plasma. • Producing a large volume of filtrate will remove large amounts of urea. • Must put most of water back into bloodstream by reabsorbing the water. • Filtration process allows for the removal of large amounts of urea from the plasma & the concentration of that urea into small volume of water (urine). |
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GFR
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The amount of filtrate produced at all the nephrons per minute. Equals about 125ml/min.
• 180 liters/day |
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nephron
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A major _______ function is the removal of nitrogenous wastes, primarily urea from the plasma.
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filtrate
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Producing a large volume of _________ will remove large amounts of urea.
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reabsorbing
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Must put most of water back into bloodstream by __________ the water.
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Filtration
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___________ process allows for the removal of large amounts of urea from the plasma & the concentration of that urea into small volume of water (urine).
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reabsorption
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• Since such a high volume of filtrate is produced per day most all of what was filtered must be put back into the bloodsteam.
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active transport
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• At the proximal convoluted tubule 100% of all the nutrients filtered are reabsorbed back into the bloodstream (via peritubular capillaries). Use _______ _________ to move the nutrients.
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nonregulated reabsorption
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• About 70% of all of the electrolytes & water are also reabsorbed from the proximal convoluted tubule. Is basically automatic so is called ____________ ___________.
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loop of Henle
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• A small (approximately) 20% of salts & water are reabsorbed from the _____ ___ _____.
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HORMONES
regulated reabsorption |
• At the distal convoluted tubule & collecting tubule the amount of salt & water reabsorption is controlled by the action of ________. This is called ________ __________ because how much is actually happening can vary over time.
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active transport
passive process (diffusion) |
• Usually, most + ions are reabsorbed through ______ ________ processes while most – ions & water are reabsorbed by ________ ________ _________.
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peritubular capillaries
nephron tubules |
• Usually an active transport process that moves molecules from the ___________ __________ into the _______ _______ usually at the distant convoluted tubules or collecting tubules.
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secretion
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Provides nephrons with a 2nd way to remove unwanted molecules from the plasma.
What the 1st way? Filtration |
