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mammal test 03

# mammal test 03 - NAME SECTION For problems show your work...

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NAME ______________________________ SECTION ____________________________ For problems show your work and circle your answer Define renal clearance (2) Calculate the renal clearance of substance X given the following: GFR = 200 ml/min. Tmax = 400 mg/min. Plasma concentration of X = 2 mg/100 ml Renal fraction = 30% Urine concentration of X = 4 mg/ml Hematocrit = 50 R. Clearance of sodium = 20 Urine volume = 120 ml/hr. Calculate the amount of substance X excreted per minute given the following information: Renal clearance of PAH = 900 Renal fraction = 40% Tmax = 400 Renal clearance of inulin = 200 Urine concentration of X = 20 mg/ml Hematocrit = 50 Plasma concentration of X = 3 mg/ml Calculate the renal plasma threshold of X given the following: Creatinine clearance = 150 Hematocrit = 50 Filtration fraction = 20% Cardiac output = 6000 ml/min Tmax = 400 Urine volume = 20 ml/5 min. Urine concentration of X = 2 mg/ml Calculate the renal fraction given the following: GFR = 200 ml/min Urine volume = 6 ml/min Filtration fraction = 20% Hematocrit = 50 Tmax = 300 Cardiac output = 6,000 ml/min.

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Calculate the renal clearance of inulin given the following information: Plasma concentration of inulin = 2 mg/ml Tmax = 0 Urine concentration on inulin = 4 mg/ml Renal blood volume = 1200 ml Hematocrit = 50 Filtration fraction = 20% Cardiac output = 5000 ml/min Suppose in preceding figure line A represented the amount of PAH filtered; draw a line representing the amount of PAH excreted and label it "P". Suppose in the preceding figure line A represents the amount of inulin excreted; draw a line representing the amount of inulin filtered and label it "I". PUT ALL ANSWERS FOR QUESTIONS 1 - 53 ON SCAN SHEET: 1. The following would cause an increase in thirst A. Stimulating the osmoreceptors in the hypothalamus B. Stimulating low pressure receptors in the left atrium C. ADH (Vasopressin) D. All of these E. A & B 2. Source of water loss that is regulated so as to conserve water A. Sweating D. A & B B. Fecal E. None of these C. Evaporation from lungs
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