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Questions and Answers
What is the formula for calculating the amount of substance filtered per day?
What is the formula for calculating the amount of substance filtered per day?
- Filtrated load = GFR $-$ concentration of substance in plasma
- Filtrated load = GFR $\div$ concentration of substance in plasma
- Filtrated load = GFR $\times$ concentration of substance in plasma (correct)
- Filtrated load = GFR $+$ concentration of substance in plasma
What percentage of sodium is reabsorbed by the kidneys?
What percentage of sodium is reabsorbed by the kidneys?
- 100%
- 99.4% (correct)
- 50%
- 99.9%
Which substance has the highest amount excreted by the kidneys?
Which substance has the highest amount excreted by the kidneys?
- Glucose
- Creatinine
- Bicarbonate
- Urea (correct)
What is the percentage of chloride reabsorbed by the kidneys?
What is the percentage of chloride reabsorbed by the kidneys?
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What is the average amount of plasma reabsorbed out of 180 litres filtered per day?
What is the average amount of plasma reabsorbed out of 180 litres filtered per day?
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Study Notes
Kidney Function and Filtration
- The formula for calculating the amount of substance filtered per day is not provided.
- The kidneys reabsorb approximately 99.5% of sodium.
- The kidneys excrete the highest amount of urea.
- Chloride is reabsorbed by the kidneys at a rate of around 98-99%.
- On average, the kidneys reabsorb around 179 litres of plasma out of 180 litres filtered per day, leaving only about 1 litre of plasma to be excreted.
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