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13 Cards in this Set
- Front
- Back
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the net filtration pressure in the kidneys
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10
(10 times that in normal capillaries) |
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Urinary Excretion equation
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Filtration - Reabsorption + Secretion
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Why is there a secretory component for the urinary system
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for items that are not easily or efficiently removed
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What mechanism drives filtration
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Starling
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An important component of solute reabsorption in the thick ascending limb is the ___________ pump in the epithelial cell basolateral membranes
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sodium-potassium ATPase
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______ is pumped out of the cell by sodium-potassium ATPase and chloride diffuses into the interstitial fluid via chloride channels.
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Sodium
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The mechanism by which aldosterone increases sodium reabsorption while at the same time increasing potassium secretion is by stimulating the ________pump on the basolateral side of the cortical collecting tubule membrane.
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sodium-potassium ATPase
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Transport that is coupled directly to an energy source, such as the hydrolysis of adenosine triphosphate (ATP), is termed primary active transport. A good example of this is the _______ pump
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sodium-potassium ATPase
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Transport that is coupled indirectly to an energy source, such as that due to an ion gradient, is referred to as __________
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secondary active transport
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Reabsorption of glucose by the renal tubule is an example of __________ transport
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secondary active
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Some substances, such as ________, are almost completely reabsorbed from the tubules, so that the urinary excretion rate is essentially zero.
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glucose and amino acids
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Many of the ions in the plasma, such as _________, are also highly reabsorbed, but their rates of reabsorption and urinary excretion are variable, depending on the needs of the body.
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sodium,
chloride, and bicarbonate |
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Certain waste products, such as _________, conversely, are poorly reabsorbed from the tubules and excreted in relatively large amounts.
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urea and creatinine
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