Question |
Answer |
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What are the two cells types of the distal tubule and what are their functions? |
- Principal cells
- Absorb sodium
- Excrete potassium and hydrogen
- Site of action of Aldosterone
- Intercalated cells
- ATP driven proton secretion
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Where does the collecting duct develop from? |
The branched ureteric bud |
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How is potassium excreted in the distal tubule? |
Using the potassium/chloride symporter |
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By which two methods is H+ secreted? |
- H+ ATPase
- H+/K+ ATPase antiporter
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Despite urea passively diffusing out of the collecting its concentration actually increases. Why? |
Water follows the urea as it is absorbed |
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