B265 Test 1 Fall 2000

B265 Test 1 Fall - test1 Fall 2000 Biology 265 PREMED411.com First Test Fall 2000 Form 0 1 When the temperature increases the energy of activation

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Unformatted text preview: test1 Fall 2000 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. a. true b. false 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 a. conduction is proportional to surface area b. fur is a good heat conductor c. counter current circulation in the ears retains heat d. all of the above 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 c. 2.0 d. can’t tell from the data given 8. In both ectotherms and endotherms increase metabolic rate varies with mass .75 a. true b. false 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 a. the formation of glycogen in the liver b. the formation of glucose from amino acids c. cellular release of glucose d. all of the above 11. The metabolic rate of a manatee is much higher than that of a normal human. file:///PowerBase/Desktop%20Folder/tUtoring-U/B265/B265test1 Page 1 of 4 test1 1/23/01 11:00 PM a. true b. false 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 a. 1.0 b. 0.75 c. 2.0 d. 0.71 14. Leptins are produced by adipose tissue, they primarily target or affect a. muscle tissue b. the thyroid c. the hypothalamus d. all body cells 15. The surface tension on the wall of a small alveolus is greater than on a larger alveolus a. true b. false 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 17. The partial pressure of nitrogen at sea level in dry air is a. 760 mm Hg b. 160 mmHg c. 0.7 mmHg d. 600 mmHg 18. As air is inspired and moves to the alveoli, the partial pressure of oxygen a. increases b. decreases c. doesn’t change 19. The gradient between the alveolar air and the capillary partial pressure is greater for carbon dioxide than it is for oxygen. a. true b. false 20. Which has the highest affinity for oxygen ? a. adult hemoglobin b. fetal hemoglobin c. myoglobin 21. In high altitude acclimation, a. DPG levels increase b. hemoglobin increases its affinity for oxygen c. blood pH becomes more acidic d. all of the above 22. Which respiratory pigment is the most widely distributed in the animal kingdom ? a. hemoglobin b. hemerythrin c. chlorocurorin d. myoglobin 23. The 1⁄2 saturation value for pO2(Km) for normal hemoglobin at pH 7.75 is approximately .a. 16 mmHg b. 30-35 mmHg c. 55-60 mmHg d. 110 mmHg 24. Which of the following is not true of diving animals ? a. the hematocrit is generally higher b. the blood space is larger c. the lungs are proportionally larger file:///PowerBase/Desktop%20Folder/tUtoring-U/B265/B265test1 Page 2 of 4 test1 1/23/01 11:00 PM d. circulation to the muscles is reduced e. all are true 25. –29. Match 25. 26. 27 28. 29. Secretes HCl d Secretes mucus c Secretes pepsinogen e Secretes histamine b Secretes somatostatin a. D cells b. Enterochromafin cells c. Goblet cells d. parietal cells e. chief cells a 30. Which of the following is not a function of HCl in the stomach a. release of free pepsin b. denaturation of protein c. increased activity of pepsin d. cleavage of peptide bonds 31. Bilirubin is a biproduct of the breakdown of a. phospholipids b. cholesterol c. hemoglobin d. muscle protein 32. Amiono acids are absorbed by the capillaries of the small intestine in chylomicrons. a. true b. false 33. High levels of _______________ are most closely linked to atheroschlerosis. a. VLDLs b. LDLs c. HDLs 34. Secreted by the small intestine, this hormone inhibits gastric secretion and stimulates contraction of the gall bladder. a. secretin b. gastrin c. CCK d. all of these 35. This graf describes the effect of different pyruvate concentrations on the velocity of two isozymes of a human enzyme. Which enzyme ? a. lactate dehydrogenase b. pyruvate kinase c. PEP carboxykinase d. phosphofructokinase 36. Which form of the enzyme is found in the heart and is inhibited at higher concentrations of pyruvate ? a. A. b. B c. neither d. both 37. CO2 + H2O H2CO3 HCO3 -+H+ The overall pK for this reaction is 6.1 At what pH is carbonate the most effective buffer ? a. 7.8 b.7.2 c. 6.8 d. 6.1 38. When the ratio of the concentration of bicarbonate to CO2 is 100 to 1,what is the pH ? a. 6.1 b. 7.2 c. 7.8 d. 8.1 39. Cells that release antibodies into circulation file:///PowerBase/Desktop%20Folder/tUtoring-U/B265/B265test1 Page 3 of 4 test1 a. T cells b. plasma cells 1/23/01 11:00 PM c. macrophages d. all of these 40. Cells responsible for recognition of foreign grafted tissue a. B cells b. T cells c. granulocytes d. all of these 41. The anitibody that is secreted in tears and sweat and milk a. IgA b. IgG c. IgE d. IgM 42. Which of the following is true ? a. sharks produce only one antibody type b. sharks have many more d,j,and c genes in clusters than humans c. sharks have the same T cell receptors as humans d. sharks depend more on inherited immunity than humans 43. The activation of the complement system results in a. insertion of protein holes in a foreign invader b. attraction of macrophages to the area c. stimulation of the macrophages to ingest foreign invaders (opsonization) d. all of the above 44. Cells that present IgE antibodies and release histamine when they are bound a. mast cells b. memory cells c. plasma cells d. helper T cells 45. MHC II antigens are found a. on all T lymphocytes b. on APC cells and B cells c. on helper T cells only d. on all the lymphocytes but not on body cells 46. It is possible for a single plasma cell to produce both IgM and IgG antibodies against the same antigen. a. true b. false 47. Which cells mature and are selected by the thymus a. macrophages b. plasma cells c. granulocytes d. T cells 48. The antifreeze agent used by the Canadian wood frogs is a. a protein b. a glycoprotein c. glucose d. cholesterol 49. The first cells to infiltrate an infection site a. neutrophils b. T cells c. APC cells d. B cells 50. In humans, the genes coding for antibody protein segments are located in clusters on 5 chromosomes. a. true b. false file:///PowerBase/Desktop%20Folder/tUtoring-U/B265/B265test1 Page 4 of 4 Biology 265 PREMED411.com Fall 2000 Test 2 1.Which hormone bind to a nuclear receptor for DNA activation ? A. epinephrine B. thyroxine C. ADH D. TSH E. All of the above 2.In the developing male fetus, neural development pathways are most directly influenced by ______during the critical period at approximatley 12-14 weeks. A. testosterone B. DHT C. Estradiol 17 B D. MIF 3. T he hypthetical product of the SRY gene is A. testosterone B. estradiol 17 B C. TDF D. MIF 4.Prostaglandins A. are produced from membrane constituents B. are fat soluable C. have a number of different effects D. all of the above 5.The hormone produced by the adrenal gland A. ADH B. Cortisone C. Insulin D. Melatonin E. All of the above 6.The agent most responsible for the release of Ca++ from intracellular stores A. IP3 B. Aracodonic acid C. Diacyl glycerol D. CAMP 7.Which of the following statements about the hypothalamic-releasing hormones is true ? A. they are secreted into capillaries in the median eminence B. They are transported by portal veins to the anterior pituitary C. The stimulate the secretion of specific hormones from the anterior pituitary D. All of the above 8.Which of the following hormones uses cAMP as a second messenger ? A.testosterone B.cortisol C.insulin D.epinepherine 9.Which of the following terms best describes the interactions of insulin and glucagon ? A.synergistic B.permissive C.antagonistic D.cooperative 10. Which hormone requires retinoic acid as a binding cofactor ? A.insulin B.thyroxine C.epinepherine D.estrogen Match 11-14 A.prximal tubule B.b. descending limb of the loop of Henle C.ascending portion of the loop of Henle D.collecting duct 11. Active transport of sodium;water follows passivelyA 12. Active transport of sodium chloride: impermeable to waterC 13. Passively permeable to water B 14. Water permeability is regulatedD 15. Substance X has a clearance greater than 0 but less than inulin. What do you conclude about substance X ? A.It is not filtered B.It is filtered, but not secreted and not reabsorbed. C.It is filtered and partially reabsorbed D.It is filtered and secreted 16. About 5-10% of sodium is reabsorbed in A.proximal tubule file:///PowerBase/Desktop%20Folder/tUtoring-U/B265/B265T2F00.html Page 1 of 4 Test 2 1/23/01 10:57 PM B.distal tubule C.descending portion of the loop of Henle D.ascending portion of the loop of Henle 17.The appearance of glucose in the urine A.occurs normally B.indicates the presence of kidney disease C.occurs only when the transport carriers for glucose are saturated D.is a result of hypoglycemia 18. If the inulin concentration of the urine is 30 mg/ml , the plasma concentration is 0.5 mg/ml, and the rate of urine formation is 2 mls/ minute, what is the glomerular filtration rate ? A.60 mls/minute B.15 mls/minute C.120 mls/minute D.30 mls/minute 19. The plasma clearance rate is normally __________________ the glomerular filtration rate A.greater than B.less than C.equal to D.not related to 20. Which organism is most likely to use free amino acids as intracellular osmotic currency ? A.a shark B.a cockroach C.a stone crab D.a pelican 21. Elasmobranchs A.retain Trimethylamine oxide in the blood B.must actively drink seawater to replace that osmotically lost C.actively secrete chloride at the gills D.all of the above 22. Transport in the frog skin A.can be inhibited by ouabain (an Na/Katpase inhibitor) B.requires Na on the basolateral surface C.requires K on the apical surface D.is not temperature dependent E.all of the above 23. The primary nitrogenous waste in insects is A.ammonia B.urea C.uric acid D.allantonin 24. The dominant ATPase is most plant cells is A.Na/K ATPase B.Calcium ATPase C.H+ ATPase D.Plants have none of these 25.The apoplastic transport pathway is A.across cells, cells membranes and cell walls B.across cells and through plasmodesmata C.along the cell wall outside cells D.through the phloem 26.The tonicity of the stomata guard cells is regulated most directly by uptake and release of A.glucose B.potassium C.calcium D.carbon dioxide 27. In C4 and CAM plants, carbon dioxide is stored as _____________ for later use in the Calvin cycle A.malate B.glucose C.bicarbonate D.glycogen 28. In normal C3 plants, the ratio of water loss to carbon dioxide fixed is A.1:1 B.10:1 C.100:1 D.600:1 29. How much work is done by the right ventricle when the cardiac output is 5 liters/minute and the mean pressure is 80mm Hg in the pulmonary artery ? A. 0.5 liter-atmospheres/minute B. 50 liter-atmospheres/minute C. 40 liter-atmosphres/minute D. 20 liter-atmospheres/minute file:///PowerBase/Desktop%20Folder/tUtoring-U/B265/B265T2F00.html Page 2 of 4 Test 2 1/23/01 10:57 PM 3 0. For a blood volume of 5 liters and a cardiac output of 5 liters/min, how long does it take for a blood cell to pass from the pulmonary artery to the right auricle ? A. 10 minutes B. 1 minute C. 0.1 minutes D. 25 seconds 31. If the heart rate is 80 beats/minute and the stroke volume is 80 mls, what is the cardiac output ? A. 640 liters B. 1 liter C. 6.4 liters D. 10 liters 32. Stroke volume is regulated by A. the volume of the ventricles when they are completely relaxed B. the total peripheral resistance C. the strength of ventricular contraction D. all of the above 33. According to the Frank-Starling Law A. As the end diastolic volume increases, the strength of contraction decreases B. When the venous return is greater the heart slows down C. The strength of ventricular contraction is greater when the ventricle is full and stretched. D. Stroke volume varies with heart rate. 34. According to Poiseuilles law A. Blood flow increases as the length of the vessel increases B. Blood flow increases with the vessel radius squared C. Blood flow is reduced with increasing viscosity D. all of the above 35. Epinepherine increases A. Cardiac output B. Heart rate C. Force of contraction D. all of the above 36. In Chara, the action potential is directly caused by the movement of A. sodium B. potassium C. chloride D. all of the above 37. In Chara, the action potential triggers a plant response, what is the response ? a. leaves contract and the plant “plays dead” b. protoplasmic streaming stops c. the plant wilts d. cells swell and become very turgid. 38. A cell is in Donnan equilibrium, the ratio of potassium inside the cell to potassium outside the cell is 10, if the internal concentration of chloride is 10mM , what is the external concentration of chloride ? A. 1 mM B. 10 mM C. 100 mM D. 11 mM 39. Carrier mediated transport displays saturation kinetics. A. trueB. false 40.What is the equilibrium potential for sodium when RT/F = 60 mV ,the external concentration of sodium is 150 mM and the internal concentration is 5 mM ? A. – 60 mV B. –90 mV NO Right Answer Question Dropped C. – 30 mV D. 18 mV 41. If Na/K ATPase were poisoned, would a cell shrink or swell ? A. shrinkB. swellC. the volume would stay the same 42. The QRS wave of an EKG is produced by A. depolarization of the auricles B. repolarization of the auricles C. depolarization of the ventricles D repolarization of the ventricles 43. When there is a block of the conductivity of the pacemaker pathway from the sino-atrial node, how is the EKG affected ? A. there is no effect B. the distance between the p wave and the qrs wave is greater C. the distance between the p wave and the qrs wave is smaller D. the p wave disappears 44. Angiotensin A. promotes a decrease in blood pressure B. stimulates aldosterone C. increases the volume of the urine file:///PowerBase/Desktop%20Folder/tUtoring-U/B265/B265T2F00.html Page 3 of 4 Test 2 1/23/01 10:57 PM D . all of the above 45. Atrionaturitic (ANF) factor A. mimics the action of aldosterone B. promotes a decrease inblood pressure C. inhibits ADH D. all of the above 46. The action potential has a long plateau A. cardiac myocyteb. pacemaker cellc. bothd. neither 47. Sodium, potassium and calcium ions leave the cell through gap junctions. A. cardiac myocyteB. pacemaker cellC. bothD. neither 48. When a cell is in Donnan equilibrium, the potassium concentration inside is greater than outside. A. trueB. false 49. Cl enters the cell via a linked carrier for Na/K/Cl in a. shark rectal gland b. teleost gill c. avian salt gland d. all of the above 50. Sodium concentration of the blood is higher than the external medium in A. seawater fish B. freshwater fish C. shark D. marine invertebrate. file:///PowerBase/Desktop%20Folder/tUtoring-U/B265/B265T2F00.html Page 4 of 4 Biology 265 P REMED411.com Fall 2000 Biology 265 Exam Three Fall 2000 Form 1 (Only one answer for each) 1.The voltage sensitive sodium gates are open B 2.Potassium moves out of the axon. . D 3.The axon potential is equal to the sodium equilibrium potential. C 4.The relative refractory period. E 5.The axon potential is equal to the potassium equilibrium potential A 6. Saltatory conduction is used by the squid to speed muscle contraction a. trueb. false 7. As the strength of a stimulus increases, a. the amplitude of the action potential increases b. the duration of an action potential increases c. the frequency of action potentials increases d. all of these 8. Which of the following is true of saltatory conduction ? a. This type of conduction is found only in large invertebrate axons. b. Depolarizations and gate openings occur all along the axon c. Depolarizations occur at the nodes between myelin sheath insulation. d.This conduction is found only in axons in the CNS 9. Which area of the brain is the center ofemotion, lust and motivation ? a. ponsb. medullac. limbic systemd. cerebellum Match a. rod cellsb. olfactory receptorsc. auditory hair cells d. more than one of thesee. none of these 10.Na channels are open when not stimulated A 11.Mechanical properties of actinomyosin force channel opening C 12.Signal reception is mediated by G proteins D 13.There are more than 50 different genes receptors polypeptides B 14.Information may reach the brain through alternate pathways with little cortical processing B 15. Which ion is required for the release of neurotransmitter from the presynaptic bulb at the neuromuscular junction ? a. potassium b. chloridec. calciumd. magnesium 16.Which neurotransmitter is inactivated by the action of COMT and MAO ? a. acetylcholine b. norepinepherinec. glutamined. cocaine 17.When acetylcholine is bound, the post synaptic membrane at the neuromuscular junction a. responds with a graded excitatory potentialb. responds with a graded inhibitory potential c. becomes permeable to chloride d. always fires an action potential 18.Which of the following is a slow response post synaptic receptor ? a. muscarinic acetylcholine receptor b. dopamine receptor c. beta andrenergic (norepinepherine) receptor d. all of the above file:///PowerBase/Desktop%20Folder/tUtoring-U/B265/B265T3F00.html Page 1 of 3 Biology 265 1/23/01 10:55 PM 19.The inhibitory neurotransmitter used at the vertebrate neuromuscular junction is a. dopamineb. acetylcholine c. norepinepherined. there isn't one 20. With a fast acetylcholine receptor, which ions carry the current ? a. sodium and chlorideb. sodium and potassium c. chloride and potassiumd. sodium, chloride and potassium e. sodium alone 21.Which poison blocks the release of neurotransmitter at the neuromuscular junction ? a. acetylcholinesteraseb. botulism toxinc. strychnined. cocaine 22. Acts in long term potentiation to increase presynaptic neurotransmitter a. acetylcholineb. norepinepherinec. seratonind. nitric oxide 23. A single neuron in the CNS may produce more than one neurotransmitter. a. true b. false 24.Which retinal cells produce an action potential ? a. rod cellsb. bipolar cellsc. ganglionic cells d. horizontalcellse. all of these 25.Visual acuity is greatest when the image is focused on a. the foveab. the area immediately around the fovea c. the widest visual fieldd. the area with the most rod cells. 26. Which cells of the retinal can either hyperpolarize or depolarize when stimulated ? a. armacrine cellsb. horizontal cellsc. ganglionic cells d. rod cells 27. Which sequence represent the flow of visual information in processing ? a. rod to bipolar to ganglionic to lateral geniculate nucleus to simple cell b. rod to amacrine to ganglionic to simple cell to lateral geniculate nuclues c. rod to ganglionic to bipolar to lateral geniculate nuclues to complex cell d. rod to bipolar to horizontal cell to ganglionic cell to simple cell 28. Color is perceived as cones are tuned to different wavelengths of light. What makes this possible ? a. opsins in the cones are differentb. retinal molecules of the cones we different c. each cone has a different ion channel d. all of the above 29. The largest shift in refraction occurs when light moves between a. the lens and the vitreous humor b. the aqueous humor and the leis c. the cornea and the aqueous humor d. the air and the cornea 30. Ina near sighted individual a.the image is in focus in front of the retina b.the eyeball is too long for the image c.the cornea and the lens produce too much refraction d.concave lenses correct the problem e.all of the above 31. The energy level of sound, light or chemical presented to a receptor may be lower than the energy level of the train of AP that it produces a. true b. false 32.The range of hearing in an adult extends up to a. 40,000 Hzb. 20,000 Hzc. 300 Hzd. 90,000 Hz 33.Because receptors relay information with a frequency of action potentials proportional to the log of the stimulus strength --a.receptors are more sensitive to high level energy stimuli b. receptors are more sensitive in the lower energy range c.receptors present relative information d.receptors are phasic 34.Near the stapes (stirrup) end of the cochlea, a. low pitched sounds are perceived b. high pitched sounds are perceived c. there is no difference 35. Which muscles have the highest number of nerves per motor unit ? a. muscles of the calfb. muscles of the upperarm c. muscles of the faced. muscles of the thigh 36. Which muscle in humans is arranged as a Class II lever ? a. epaxial muscles of the neck b. gastrocnemius muscle of the calf c. biceps muscle of the upper arm d. all of these 37.The pitch of a sound is correlated with a. the amplitude of the sound wave perceived b. the frequency of the sound wave perceived c. the length of time hair cells are deflected d. the amplitude of the AP produced by the auditory neurons Trace the path of sound waves as they travel through the ear. Arrange in order: a. eardrum or tympanum b. hair cells on basement membrane c. hammer, anvil, stirrup d. cochlear fluid e. auditory canal 38. First E39. Second A40. Third C 41. Fourth D42 Fifth B file:///PowerBase/Desktop%20Folder/tUtoring-U/B265/B265T3F00.html Page 2 of 3 Biology 265 1 /23/01 10:55 PM 43. Which of the following muscles cannot depolarize spontaneously ? a. cardiac muscleb. smooth musclec. skeletal muscle c.A and B cannotd.B and C cannot question eliminated due to confusion of answers 44. In isometric contraction a. the length of the muscle is constant b. the tension on the muscle is constant c. bones are moved through a very wide arc d. both the length and the tension are constant 45. The role of the sarcoplasmic reticulum in muscle contraction a. stores myoglobinb. forms the motor end plate c. sequesters and releases Ca++c. stores and releases creatine phosphate Arrange the sequence steps in light perception in order: a.transducin activates phosphodiesterase b.opsin changes conformation c.Na channel closes d.Cyclic GMP is hydrolyzed to GMP e.Retinal changes from the cis to trans form 46..First E47. Second B48. Third A 49. Fourth D50. Last C . file:///PowerBase/Desktop%20Folder/tUtoring-U/B265/B265T3F00.html Page 3 of 3 ...
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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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