Exam IV Key 2007

Exam IV Key 2007 - Examination IV VPHY 3100 Elements of...

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Examination IV VPHY 3100 Elements of Physiology April 30, 2007 1:25 - 2:15 p.m. Multiple Choice (2.5 points each) Choose the best answer 1. Which of the following does NOT correctly describe kidney function? The kidneys: A. contribute significantly to long-term regulation of arterial blood pressure by maintaining the proper plasma volume. B. *produce urine of a fixed composition in order to maintain homeostasis of extracellular fluid. C. assist in maintaining proper acid-base balance in the body. D. secrete hormones. 2. Which of the following statements concerning the process of glomerular filtration is correct? A. *The hydrostatic pressure in the glomerular space opposes filtration. B. The glomerular filtration rate is limited by a transport maximum. C. All of the plasma that enters the glomerulus is filtered. D. Creatinine can be used to measure glomerular filtration rate. 3. The amount of a substance that is excreted in the urine is equal to the amount that is _____ plus the amount that is _____ minus the amount that is _____. A. filtered, reabsorbed , secreted. B. reabsorbed, filtered, secreted. C. secreted, reabsorbed, filtered. D. *filtered, secreted, reabsorbed. 4. The renal autoregulation on the glomeruli results in A. an increase in GFR. B. a decrease of GFR. C. *a constant GFR. D. a fluctuation of GFR. 5. Which of the following substances has a clearance rate that is greater than the glomerular filtration rate? A. *PAH. B. urea. C. glucose. D. potassium. 6. Which one of the following conditions has the lowest osmolality? A. Ultrafiltrate in the proximal convoluting tubules. B. *Ultrafiltrate in the distal convoluting tubules. C. Ultrafiltrate in the tip of the loop of Henle. D. Ultrafiltrate in the tip of the vasa recta. 1
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7. Which of the following is NOT true of the countercurrent multiplier mechanism? A. It actively transports Cl - out of the ascending loop of Henle. B. *It actively transports Na + out of the descending loop of Henle. C. Water passively diffuse out of the descending loop of Henle. D. NaCl becomes concentrated at the tip of the loop of Henle. 8. The clearance rate of proteins normally is A. *almost zero. B. similar to GFR. C. higher than GFR. D. lower than GFR. 9. Which of the following statements about the countercurrent exchange of vasa recta is NOT correct? A. Hypertonic salts in tissue fluid diffuse into blood of the descending capillary loop. B.
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Exam IV Key 2007 - Examination IV VPHY 3100 Elements of...

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