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10 Cards in this Set
- Front
- Back
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the kidney has the following funtions:
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- regulating the composition of blood
- regulating blood pressure - maintaing the body's calcium level - stimulating the production of red blood cells |
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the kidney, repectively the nephrons regulate the composition of blood by:
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- maintaining the water volume constant
- removing wastes such as urea - maintaining the concentration of mineral ions and other substances constant |
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Where does ultrafiltration occur?
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in the renal corpuscles
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How much glomular filtrate is produced each day?
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180 l
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How does ultrafiltration in the proximal convoluted tubule work?
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the efferent arterioles are smaller than the afferent and so a high blood pressure is created
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Where does reabsorption in the proximal convoluted tubule occur?
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in the proximal convoluted tubule
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What is reabsorbed in the proximal convoluted tubule and how?
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- NA+ by active transport
- Cl- and other negatively charged ions through an electrochemical gradient - water by osmosis - urea by diffusion - glucose and amino acids by a special type of active transport (sodium cotransport) |
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By how much is the volume of the filtrate reduced?
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80%
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The loop of Henlé and its surrounding capillaries form a ...
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countercurrent mechanism
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3 main functions of the loop of Henle are
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- water is reabsorbed from the descending limb
- Na+ and Cl- are reabsorbed in the ascending limb - reabsorption of Na+ and Cl- creates a high solute concentration in the medulla |
