Exam3V1 - ECOL182R INTRODUCTORY BIOLOGY John PEPPER/Kevin...

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ECOL182R INTRODUCTORY BIOLOGY John PEPPER/Kevin BONINE/Peter CHESSON MIDTERM THREE 15 April 2008 STUDENT NAME:_______________________________________________________ Please Print: Last Name First Name USE A NUMBER TWO PENCIL, NO PEN! PLEASE CHOOSE THE ONE BEST ANSWER. 1. Which of the following is the BEST definition of physiology? a. the maintenance of stable conditions in the internal environment of an organism b. the study of metabolism c. the study of the mechanical, physical, and biochemical functions of living organisms d. the study of the distribution and abundance of organisms 2. Which of these statements about oxygen is TRUE? a. oxygen is more soluble in air than it is in water b. oxygen is more soluble in warm water than it is in cold water c. oxygen has a higher affinity for hemoglobin than does carbon monoxide d. the partial pressure of oxygen in air at sea level is 760 mmHg (= 1 atm of pressure) 3. If you compare different species, the larger animals have … ________ … than do smaller animals a. higher per gram metabolic rates b. higher total oxygen consumption per day c. larger surface-area to volume ratios d. lower total food requirements 4. Which of these organisms does the highest proportion of its gas exchange across the skin? a. amphibian b. reptile c. mammal d. bird 5. Why do dogs not hyperventilate when they pant? a. panting increases dead space ventilation much more than it increases alveolar ventilation b. panting is very energetically expensive so dogs need all the extra oxygen that comes with breathing deeply and often during panting c. dogs have unidirectional parabronchi that facilitate oxygen extraction from the air d. dogs have special buffers (not found in other mammals) in their lungs, blood, and kidneys that counteract the effects of hyperventilation
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6. In the figure to the right, which letter best represents where hemoglobin is dropping off oxygen to the tissues in your calf muscle while you are asleep? a. A b. B c. C d. D 7. Which animal typically has the largest surface area for gas exchange for its body size? a. fish b. mammal c. bird d. lizard 8. The oxygen dissociation curve for _______________ is sigmoidal because ____________ . a. myoglobin, the binding of one oxygen molecule changes the affinity of the other binding sites for oxygen b. myoglobin, the loss of one iron molecule changes the affinity of myoglobin for the other iron molecules c. hemoglobin, the binding of one oxygen molecule changes the affinity of the other binding sites for oxygen d. hemoglobin, the loss of one iron molecule changes the affinity of hemoglobin for the other iron molecules 9. Which of these allows for a greater exchange of oxygen from water to blood in the fish gill? a. counter-current exchange in cold water
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This note was uploaded on 01/31/2009 for the course BIO 182 taught by Professor Chaux during the Spring '08 term at University of Arizona- Tucson.

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Exam3V1 - ECOL182R INTRODUCTORY BIOLOGY John PEPPER/Kevin...

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