The rate of urea filtration and urea reabsorption

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Reference no: EM133932321

Question

The following test results were obtained over a 24-hour period:

urine volume = 1.4 L

urine [inulin] = 100 mg%

urine [urea] = 220 mmol L^-1

urine [PAH] = 70 mg mL^-1 (PAH: Para-aminohippurate)

plasma [inulin] = 1 mg%

plasma [urea] = 5 mmol L^-1

plasma [PAH] = 0.2 mg mL^-1

hematocrit = 0.40 Calculate:

(A) C_inulin, C_urea, C_PAH;

(B) The rate of urea filtration;

(D) The rate of urea reabsorption;

(E) The rate of PAH filtration;

(F) The rate of PAH excretion;

(G) The rate of PAH filtration secretion.

(H) C_PAH has been widely used to estimate the effective renal plasma flow, ERPF. Why can we use C_PAH to estimate ERPF?

Reference no: EM133932321

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