Biol112-Exam3a-08 - version A (note this on your Scantron)...

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1 version A (note this on your Scantron) your ID#:___ KEY-A _____ 90 total points possible Biol 112—General Biology II Exam 3 3 March 2008 There are 45 questions worth 2 points each. Choose the one best answer and circle the letter. You must use a ball point pen on this exam sheet; pencil is required for the Scantron form. Only Scantrons submitted with this exam document will be accepted and scored. 1. Fat digestion and absorption involves the following, listed alphabetically: 1) Bile salt emulsification of fats; 2) Chylomicrons; 3) Lacteals; 4) Micelles; 5) Pancreatic lipase. The correct sequential order for these, based on order of appearance and activity, is a. 1, 5, 4, 2, 3 ! b. 5, 2, 1, 3, 4 c. 4, 1, 3, 5, 2 d. 2, 4, 5, 1, 3 2. A patient can produce antibodies against some bacterial pathogens, but does not produce antibodies against viral infections. This is probably due to a disorder in which cells of the immune system? a. B cells b. macrophages c. natural killer cells d. T cells ! 3. A blood vessel in someone is punctured or otherwise damaged. The following events are likely to occur, listed at random: I. damaged cells together with platelet & blood factors cause prothrombin to transform into thrombin II. fibrin fibers trap blood cells in a meshwork (“clot”) III. platelets autosecrete material which causes adjacent platelets to clump together IV. thrombin induces fibrinogen to become fibrin The correct sequence of these events is: a. IV, III, I, II b. III, I, IV, II ! c. I, IV, III, II d. II, III, IV, I 4. Consider an ectotherm and an endotherm of equal body size. The ectotherm is more likely to survive an extended period of food deprivation than the endotherm because a. the ectotherm is sustained by a higher basal metabolic rate. b. the ectotherm will expend less energy/kg body weight than the endotherm, and the ectotherm will invest little to no energy in temperature regulation. ! c. actually, assuming equal size, the ectotherm and the endotherm will have the same energy expenditures. d. none of the above are incorrect
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2 5. Select the pair in which the nitrogenous waste is incorrectly matched with the benefit of its excretion. a. urea—low toxicity relative to ammonia b. ammonia—very soluble in water c. uric acid—minimal loss of water when excreted d. urea—very insoluble in water ! 6. Which of the following statements about the mammalian digestive system is true ? a. All foods begin their enzymatic digestion in the mouth. b. After leaving the oral cavity, the bolus enters the larynx. c. The epiglottis prevents food from entering the trachea. ! d. The trachea leads to the esophagus and then to the stomach. 7. Which of the following statements about bioenergetics is true? a. An animal's metabolic rate never changes.
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This note was uploaded on 04/17/2008 for the course BIOL 112 taught by Professor Mcclowskey during the Winter '08 term at La Sierra.

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Biol112-Exam3a-08 - version A (note this on your Scantron)...

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