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B265 Test 1 Fall 2000 - test1 Fall 2000 Biology 265...

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Biology 265 PREMED411.com First Test Fall 2000 Form 0 1. When the temperature increases, the energy of activation of an enzymatic reaction is decreased. a. true b. false 2. Metabolic rate increases in order to heat or to cool an animal outside its range of thermal tolerance. true b. false a. 3. In organisms from very warm environments, membranes have a much lower concentration of cholesterol than membranes in organisms in cold climates. a. true b. false 4. The hotter the surface temperature of a body, the shorter the wavelength of energy that it radiates. a. true b. false 5. The artic fox has much smaller ears that a tropical cousin. This is adaptive because c. counter current circulation in the ears retains heat d. all of the above a. conduction is proportional to surface area b. fur is a good heat conductor 6. The most efficient way to produce cooling in an animal is a. convection b. conduction c. radiation d. evaporation 7. The breathing rate of a mouse at 20oC is 30 breaths/minute, at 10oC it is 15 breaths/ minute. What is the Q10 of the reaction. a. 8 b. 1.66 d. can’t tell from the data given c. 2.0 8. In both ectotherms and endotherms increase metabolic rate varies with mass .75 b. false a. true 9. Metabolic rate per unit weight of a small animal is much smaller than that of a very large animal a. true b. false 10. Insulin stimulates the formation of glycogen in the liver 11. The metabolic rate of a manatee is much higher than that of a normal human. Fall 2000 test1 Page 1 of 4 file:///PowerBase/Desktop%20Folder/tUtoring-U/B265/B265test1
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12. The end product of gut digestion of grasses in the manatee is a. glucose b. cellobiose c. lactic acid d. acetic and proprionic acid 13. The respiratory quotient for carbohydrates is b. 0.75 c. 2.0 d. 0.71 a. 1.0 14. Leptins are produced by adipose tissue, they primarily target or affect c. the hypothalamus 15. The surface tension on the wall of a small alveolus is greater than on a larger alveolus b. false a. true 16. In ventilation/perfusion coupling, smooth muscle of the pulmonary arterioles responds to a. partial pressure of oxygen b. bicarbonate monoxide c. partial pressure of of carbon dioxide d. pH The partial pressure of nitrogen at sea level in dry air is a. 760 mm Hg b. 160 mmHg c. 0.7 mmHg 17. d. 600 mmHg
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