B265 Test1 Spring 2008

B265 Test1 Spring 2008 - OM 1.C D41 - PR EME D41 1.C OM...

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Unformatted text preview: OM 1.C D41 - PR EME D41 1.C OM Biology 265 Spring 2008 First Test - PR EME Form 1 1.C OM - PR EME D41 1.C OM 1. The respiratory quotient is defined as a. carbon dioxide produced divided by oxygen consumed b. oxygen consumed divided by carbon dioxide produced c. the rate of heat liberated to calories contained d. the rate of oxygen consumed to heat liberated - PR EME D4 11. COM - PR EME D41 2. Specific dynamic action refers to a. the rate of heat produced by resting metabolism b. the increase in oxygen consumption that occurs after eating c. the change in metabolic rate from resting to active exercise d. the ratio of the metabolic rate in a large organism vs a small organism COM 3. Which ion assists in the absorption of sugars by the small intestine ? a. Sodium b. chloride c. Potassium d. Calcium - PR EM ED4 11. COM - PR EME D4 11. Match a. Gall bladder b. stomach c. pancreas d. small intestine e. liver 11. COM - PR EM ED4 11. COM 4. Releases billirubin to the general digestive tract--a 5. Releases bicarbonate--c 6. Releases salts for emulsification--a 7. Absorbs alcohol and aspirin --b 8. Secretes gastrin--b 9. Secretes cholycystokinin (CCK) --d - PR EM ED4 10. Which class of foods is partially digested in the stomach ? a. fats b. carbohydrates c. proteins - PR EM ED4 11. COM 11. Which class of foods is transported from the intestine directly into the lymphatic fluid a. amino acids b. sugars c. fats d. sugars and fats e. amino acids and fats PRE MED 411 .CO MPRE M ED4 11. COM - PR EM ED4 11. COM 12. What does the Km tell us about an enzyme ? a. the max rate of turnover of reactant to product b. the thermal stability of the reaction c. the energy of activation of the reaction d. the affinity of the enzyme for its substrate OM 1.C D41 - PR EME - PR EME D41 1.C OM - PR EME D41 1.C OM 13. The average kinetic energy of a population of molecules increases 2-3% for every 10oC . How does this change the energy of activation needed by these molecules for a reaction ? a. there is no change in the energy of activation b. the energy of activation must be 2-3% greater c. the energy of activation must be 2-3% less d. the energy of activation doubles 1.C OM 14. In muscle, when oxygen is limiting the end product of metabolism is a. lactate b. alcohol c. pyruvate d. water - PR EME D4 11. COM - PR EME D41 15. In brown adipose tissue a. the H+ gradient in the inner mitochondria is increased b. more ATP is generated per mole of glucose metabolized c. thermogenin provides and ion channel in the inner membrane for H+ movement d. all of the above COM 16. How many carbon atoms are there in a molecule of pyruvate a. one b. two c. three d. four - PR EME D4 11. 17. Which compound is regenerated in fermentation, so that glycolysis can continue ? a. NAD b. ADP c. NADH d. ATP ED4 11. COM 18. Large animals consume more oxygen per gram animal than small animals do. a. true b. false - PR EM ED4 11. COM - PR EM 19 .An animal with a temperature of approx imately 300 oK will radiate a. red visible light, 700 nm b. UV light less than 200 nm c. infra red radiation 10,000 nm d. radio waves greater than 100,000 COM - PR EM ED4 11. COM 20. Which of the following are affected by temperature ? (Assume that the products, reactants and enzymes are increased or decreased by the same amount). a. the rate of a reaction b. the direction of a reaction c. the energy of activation of a reaction d. a and b e. a and c - PR EM ED4 11. 21. What is the pH of the small intestine ? a. 3.0 b. 8.5 c.7.5 d. 12 ED4 11. COM 22. What is the most effective means of cooling for a mammal ? a. conduction b. convection c. evaporation d. radiation PRE MED 411 .CO MPRE M ED4 11. COM - PR EM 23. In addition to enzyme activity, what other biochemical parameter is most affected by temperature change at biological temperatures ? a. membrane fluidity b. ATP production c. breathing rate d. all of these OM 1.C D41 - PR EME D41 1.C OM 24. Which material provides the best insulation ? a. silver b. blubber c. water d. still air D41 1.C OM - PR EME 25. The inside epithelial layer of the digestive tract that forms villi and rugae a. submucosa b. mucosa c. serosa d. sub serosa - PR EME D41 1.C OM - PR EME Arrange in order as glucose is metabolized a. acetyl CoA enters the Krebs cycle b. sugar is phosporylated in glycolysis c. most electrons are harvested by NAD d. the H+ gradient is used to produce ATP e. PEP is converted to pyruvate - PR EM ED4 11. COM - PR EM ED4 11. COM - PR EME D4 11. COM - PR EME D4 11. COM 26. First--b 27. Second--e 28. Third--a 29. Fourth--c 30. Last--d - PR EM ED4 11. COM In the graph above Tb is the body temperature of the animal and Ta is the temperature of the environment, LCT is the lower critical temperature and UCT is the upper critical temperature. - PR EM ED4 11. COM 31. For the ground hog, lower critical temperature of 17C and an upper critical temperature of 25. Does the metabolic rate fall below 17oC a. yes b. no c. impossible to tell from this data COM - PR EM ED4 11. COM 32. If animal’s body temperature is 25 oC. What happens ? a. the animal generates heat in metabolism that must be dissipated b. the animal absorbs a lot of heat from the environment c. the metabolic rate begins to increase d. A and B e. A and C PRE MED 411 .CO MPRE M ED4 11. 33. We observe that when a marine invertebrate, like a copepod, is placed in a lower salinity medium, ammonia excretion increases. What is happening ? a. more amino acids are released from protein b. sodium is rapidly transported into the animal OM 1.C D41 - PR EME D41 1.C OM c. more amino acids are metabolized and cellular osmolarity is reduced d. NAD+ is replenished D41 1.C OM - PR EME D41 1.C OM - PR EME 34. Lactate dehydrogenase acts as a branchpoint enzyme to regulate movement of carbon skeletons into fermentation or the Krebs cycle. Which of the following statements is true ? a. LDH of the heart is inhibited at high concentrations of pyruvate b. LDH of muscle has a lower affinity for pyruvate that that of the heart c. LDH of muscle shows a straight Michaelis Menton hyperbolic graph d. all are true e. all are false - PR EME D4 11. COM - PR EME 35. Which of the following is the most direct measure of metablic rate ? a. the amount of oxygen consumed per unit time b. the amount of heat generated per unit time c. the amount of carbon dioxide released per unit time d. the calories in the food eaten minus the calories in the waste released 11. COM - PR EME D4 11. COM 36. Heat loss in minimized in tuna muscle, the feet of arctic birds and the nasal passages of reindeer by a. insulation with brown fat b. shivering c. counter current circulation d. muscles modified as heater tissue COM - PR EM ED4 37. Herbivores like the manatee generally have much shorter digestive tracts than carnivores. a. true b. false - PR EM ED4 11. 38. Human hormone that increases metabolic rate and heat production in the cold. a. glucagons b. leptin c. somatostatin d. thyroxine - PR EM ED4 11. COM 39. Small hibernating animals use this compound to prevent free radical damage when they are aroused . a. glucose b. glycogen c. vitamin C d. glycoproteins - PR EM ED4 11. COM - PR EM ED4 11. COM 40. In humans the body temp is set by a. the levels of glucose in the blood b. the sympathetic nervous system c. nerves of the hypothalamus d. the pituitary gland PRE MED 411 .CO MPRE M ED4 11. COM 41. If a developmental pattern is allometric a. as a limb doubles in length is also doubles in diameter b. the proportions of an animal change as it grows larger c. the surface to volume ratio remains constant d. stresses on arms and legs increase with size 2. OM 1.C D41 - PR EME OM d. mucosal cells - PR EME D41 1.C 42. Cells of the stomach that release HCl a. ECL cells b. chief cells c. parietal cells OM - PR EME D41 1.C OM 43. If Rubner was correct and surface/volume ratio controlled metabolic rate then a. metabolic rate = constant X body mass .75 b. metabolic rate = constant x body mass .67 c. metabolic rate = constant X body mass 1.0 d. there would be no universal relationship between mass and metabolic rate - PR EME D41 1.C 44. Which of the following acts as an intracellular oxygen storage molecule in muscle ? a. hemoglobin b. creatine phosphate c. myoglobin d. ADP - PR EME D4 11. COM 45. Which portion of the energy metabolism sequence is the most primitive and most widely distributed in animals ? a. glycolysis b. Krebs cycle c. electron transport d. oxidative phosphorylation d. all of these COM 46. Chylomicrons are used in the absorption of a. fatty acids b. amino acids c. trisaccharides COM - PR EM ED4 11. COM - PR EM ED4 11. COM - PR EM ED4 11. COM - PR EM ED4 11. COM - PR EM ED4 11. COM - PR EME D4 11. 47. The enzyme LDH catalyzes a. the conversion of pyruvate to lactate b. the conversion of pyruvate to PEP c. the conversion of lactate to carbon dioxide and water d. the conversion of lactate to acetyl CoA ED4 11. Name ______________________________________ PRE MED 411 .CO MPRE M Student Number ________________________________________________ PRE MED 411 .CO MPRE M ED4 11. COM - PR EM ED4 11. COM - PR EM ED4 11. COM - PR EM ED4 11. COM - PR EM ED4 11. COM - PR EM ED4 11. COM - PR EME D4 11. COM - PR EME D4 11. COM - PR EME D41 1.C OM - PR EME D41 1.C OM - PR EME D41 1.C OM 48-50. Discuss three ways that Antarctic emperor penguins survive in sub-zero weather. . - PR EME D41 1.C OM - PR EME D41 1.C OM - PR EME D41 1.C OM P OM Name ______________________________________________________ - PR EME D41 1.C Student Number ______________________________________________ 1.C OM 44-46 PRE MED 411 .CO MPRE M ED4 11. COM - PR EM ED4 11. COM - PR EM ED4 11. COM - PR EM ED4 11. COM - PR EM ED4 11. COM - PR EM ED4 11. COM - PR EME D4 11. COM - PR EME D4 11. COM - PR EME D41 Graph the log of the metabolic rate/ kg vs animal mass. What is the slope of the line ? ...
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This document was uploaded on 11/04/2011 for the course BIL 265 at University of Miami.

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