Given the Following Data from a Patient - Urine Output

question 3

Multiple Choice

Given the following data from a patient - urine output 1.5 L/day; plasma creatinine 1.0 mg/dL; urinary creatinine 1.2 mg/mL; plasma phosphate 0.002 mEq/mL; urinary phosphate 0.05 mEq/mL - what can you reliably conclude about the renal handling of phosphate?

• A) There is net secretion of phosphate.
• B) There is net reabsorption of phosphate.
• C) Phosphate is neither secreted nor reabsorbed.
• D) Phosphate is fractionally filtered.
• E) The extraction ratio of phosphate is greater than 1.

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