7) Considering the magnitude of glomerular filtration, the extent of tubular reabsorption is tremendous: e.g., the tubules...

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7) Considering the magnitude of glomerular filtration, theextent of tubular reabsorption is tremendous:
e.g., the tubules typically reabsorb >99% of the filteredwater (47 gallons/day), 100% of filtered sugar
(2.5 lbs/day), & ~99.5% of the filtered salt (0.65lb/day).
Describe the processes involved in passive and active reabsorption.Which membrane (i.e., which side
of the tubule cell) contains the Na + ï€K + pumps? How does thispump effect [Na + ] in the epithelial cell?

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Na K ATPase a sodium pump activetransporter is located on the opposite side of the epithelial cellIt allows three sodium ions out of cell for twopotassium ions moves into the cellThe principal processes that determine theurinary excretion of a drug arcGlomerular filtrationActive tubular secretionActive or passive tubular reabsorptionGlomerular filtration is a nonselective unidirectional processwhereby most compounds ionized or unionised are altered exceptthose that are bound to plasma proteins or blood cells and thusbehave as macromolecules The glomerulus also acts as a negatively charged selectivebarrier promoting retention of anionic compounds The driving forcefor filtration through the glomerulus is the hydrostatic pressureof the blood flowing in the capillaries Out of the 25 of cardiacoutput or 12 litres of bloodmin that goes to the kidneys viarenal artery only See Answer

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