ECOLOGY EXAM

ECOLOGY EXAM - MARTHA HUNTER/JUDITH BRONSTEIN/DANIEL PAPAJ...

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M ARTHA H UNTER /J UDITH B RONSTEIN /D ANIEL P APAJ EXAM THREE April 5, 2007 LECTURE SECTION: TTH 11:00 AM – 12:15 PM PRINT UA NetID: LAST NAME:_______________________________________________________ GENERAL INSTRUCTIONS 1. PRINT your UA NetID and last name above AND on the answer sheet. 2. Color in the answers in the appropriate circles. Use a Number 2 pencil, not a pen! Bubble darkly, so the letter can no longer be seen in the circle. 1. Which part of the nephron functions to retain glucose and amino acids before they are excreted? a. Bowman’s capsule. b. Proximal convoluted tubule. c. Loop of Henle. d. Collecting duct. 2. Which part of the nephron is responsible for generating the concentration gradient in the interstitial fluid in which the nephron is bathed? a. Bowman’s capsule. b. Proximal convoluted tubule. c. Loop of Henle. d. Collecting duct. 3. In which part of the nephron is the concentration of the fluid in the nephron greater when it leaves than when it entered? a. Glomerulus. b. Bowman’s capsule. c. Loop of Henle. d. Collecting duct.
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4. Which of the following is NOT a strategy for improving transport by increasing surface area relative to volume? a. The elaborate whorls of a camel’s nasal turbinates. b. The flow-through structure of a bird’s lungs. c. A flattened body shape. d. The extensive folding of a fish’s gills. 5. Which statement BEST captures the essence of the Panda Principle? a. Our tidal breathing and its associated limitations result from the evolutionary origin of vertebrate lungs as outpocketings of the gut. b. Each type of eye is associated with a tradeoff, involving benefits but also costs. c. Longer loops of Henle allow for more concentrated urine. d. Panting, as occurs in dogs, improves gas exchange, which is beneficial, but increases water loss, which is costly. 6. Ventilation improves gas exchange by affecting which term in Fick’s Law? a. A. b. D. c. k. d. P 1 -P 2 . 7. The thin walls of the cells of an alveolus and associated capillaries improve gas exchange by affecting which term in Fick’s Law? a. A. b. D. c. k. d. P 1 -P 2 . 8. The tidal rhythm of breathing in land-locomoting vertebrates reduces effectiveness of gas exchange by affecting which term in Fick’s Law? a. A. b. D. c. k. d. P 1 -P 2 . 9. The crosscurrent arrangement of air channels and capillaries in a bird’s lung improves gas exchange by affecting which term in Fick’s Law? a. A. b. D. c. k. d. P 1 -P 2 .
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10. The bellows-like action of what structure promotes unidirectional air flow across a bird’s respiratory membranes: a. Parabronchus. b. Lung. c. Trachea. d.
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ECOLOGY EXAM - MARTHA HUNTER/JUDITH BRONSTEIN/DANIEL PAPAJ...

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