62) Substances can enter the renal tubules by what renal processes?A) filtration onlyB) reabsorption onlyC) secretion onlyD) both filtration and secretionE) both reabsorption and secretionAnswer: D63) The amount of a substance excreted from the kidneys is calculated by which of the following equations?64) Solutes that enter the lumen of the renal tubules are excreted unless they are1165) If the amount of solute excreted per minute is greater than the filtered load, then the NET effect on the soluteis66) Which of the following equations for determining clearance is correct?A) clearance = excretion rate / glomerular filtration rateB) clearance = filtered load × glomerular filtration rateC) clearance = excretion rate / plasma concentrationD) clearance = excretion rate × plasma concentrationE) clearance = filtered load / glomerular filtration rateAnswer: C67) Which of the following equations for determining clearance is correct?68) Calculate renal clearance of X given the following information: GFR = 100 mL/min, urine flow rate = 5mL/min, plasma concentration of X = 10 mg/mL, urine concentration of X = 50 mg/mL.
69) Given that GFR is 125 mL/min and the clearance of substance Y is 200 mL/min, which of the followingMUST be true of the renal handling of substance Y?70) The clearance of what substance provides the best estimate of glomerular filtration rate?A) inulin B) glucose C) creatine D) PAH E) sodiumAnswer: A71) The clearance of what substance provides the best estimate of renal blood flow rate?1272) The clearance of which of the following substances is normally zero?
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- Spring '14
- cell biology, Kidney anatomy, Nephron, Glomerulus, glomerular filtration rate, Afferent arterioles
