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Exam 4 Chapters 20 - Homework Help_ Online Tutoring in Math

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Exam 4 Chapters 20 - Homework Help_ Online Tutoring in Math Powered By Docstoc
					1. (Points: 0)
 The connection between structure and __________ is a basic concept of biology.




a. sex b. adaptation c. species d. strength e. function


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2. (Points: 0)
 Which one of the following is an example of a tissue?




a. a red blood cell b. heart muscle c. a heart d. the circulatory system e. the liver


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3. (Points: 0)
 Which of the following is not a type of connective tissue?




a. bone b. adipose c. cartilage d. blood e. plasma


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4. (Points: 0)
 What kind of connective tissue has a liquid matrix?




a. blood b. nerve tissue c. loose connective tissue d. adipose tissue e. cartilage


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5. (Points: 0)
 Which is the most abundant kind of tissue in an animal such as a gorilla?
a. connective b. epithelial c. blood d. nerve e. muscle


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6. (Points: 0)
 The structural and functional unit of nervous tissue is the




a. nerve. b. axon. c. neuron. d. cell body. e. dendrite.


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7. (Points: 0)
 Fingernails are a component of the __________ system.




a. integumentary b. skeletal c. excretory d. respiratory e. muscular


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8. (Points: 0)
 Which of the following imaging techniques is best suited for visualizing fine anatomic
detail in the brain?




 a. X-ray tomography b. computerized tomography c. X-ray imaging d. magnetic
resonance imaging e. positron-emission tomography


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9. (Points: 0)
 What fills the spaces between the cells in your tissues?
a. interstitial fluid b. cytoplasm c. nothing but matrix fibers d. water e. neurons


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10. (Points: 0)
  A mouse's cells are much more active metabolically than a frog's. Which of the
following organs or systems would you expect to have a larger surface area in a mouse
than in a same-sized frog?




 a. intestine b. circulatory system c. lung d. All of the choices are correct. e. None of the
choices are correct.


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11. (Points: 0)
  Imagine an invertebrate that lives in an estuary where salinity varies cyclically with the
tides. If this animal practices homeostasis with respect to the salt concentration of its
body fluids, its salt concentration will show




 a. regular variations that range from large to small. b. a cyclic variation similar to that of
the surrounding water. c. slight fluctuation that are kept within a narrow range. d. a cyclic
variation depending upon when the animal drinks. e. no variations.


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12. (Points: 0)
  The vertebrate kidney helps to keep the acidity of the body fluids constant by varying
the amount of hydrogen ions (H+) it secretes into the urine. You can confidently predict
that this aspect of kidney function will be controlled by
 a. a positive feedback mechanism. b. nerve impulses from the brain. c. a negative
feedback mechanism. d. a hormone produced in the kidney itself. e. a hormone
ultimately controlled by the brain.


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13. (Points: 0)
 Most animals are




 a. suspension feeders. b. bulk feeders. c. substrate feeders. d. fluid feeders. e. None of the
choices are correct.


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14. (Points: 0)
 Which one of the following is the stage of food processing that removes undigested
material from the body?




a. ingestion b. absorption c. elimination d. gestation e. digestion


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15. (Points: 0)
 What happens to nutrient macromolecules in an animal's digestive tract?




 a. Nucleic acids and triglycerides (which diffuse across the plasma membrane) are not
digested to monomers; other macromolecules are. b. Proteins and nucleic acids are
digested to monomers before absorption; energy-storage macromolecules (starch and fat)
are absorbed whole. c. Nutrient macromolecules are digested to monomers before
absorption. d. They are absorbed whole and are broken down to monomers in the cells
that ultimately use them. e. The digestive breakdown of macromolecules is keyed to the
body's need for monomers; only the monomers that are immediately needed are
produced.
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16. (Points: 0)
 In the grasshopper, the main function of the intestine is to




a. store food. b. absorb vitamins and pulverize the food. c. absorb water and compact
wastes. d. absorb nutrients. e. digest food.


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17. (Points: 0)
 Digestion begins in the




a. esophagus. b. tongue. c. stomach. d. pharynx. e. oral cavity.


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18. (Points: 0)
 The Heimlich maneuver is performed to forcibly




 a. straighten the back. b. squeeze the ribs. c. compress the intestines. d. depress the
diaphragm. e. elevate the diaphragm.


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19. (Points: 0)
 The stomach mixes the food with the secretions of the stomach wall to form




a. acid chyme. b. acid gastrin. c. gastric juice. d. gastrin. e. a parietal bolus.
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20. (Points: 0)
 Most nutrient absorption occurs in which part of the d igestive system?




a. stomach b. liver c. small intestine d. pancreas e. large intestine


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21. (Points: 0)
  Which of the following nutrients does not begin undergoing digestion until it reaches
the small intestine?




a. complex carbohydrate b. starch c. polypeptide d. fat e. protein


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22. (Points: 0)
 Organisms suffering from malnourishment have a diet deficient in




 a. calories. b. bile and acids needed for basic digestion. c. water. d. one or more of the
essential nutrients. e. protein.


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23. (Points: 0)
 Which of the following vitamins is fat soluble?




a. biotin b. niacin c. K d. pyridoxine e. pantothenic acid
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24. (Points: 0)
  A person on a fad diet experiences muscle cramps and weakness. After talking with the
person about the unusual diet, a physician suspects that the person is most likely suffering
from a deficiency of




a. table salt. b. zinc. c. calcium. d. iodine. e. iron.


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25. (Points: 0)
 A food label indicates that the contents contain 12 grams of carbohydrate per serving, 7
grams of sugar per serving, and 2 grams of fiber per serving. How many grams of
digestible complex carbohydrate are there per serving of this food item?




a. 3 b. 12 c. 2 d. 9 e. 5


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26. (Points: 0)
 Which one of the following is not widely regarded as a healthy approach to dieting?




 a. obtain adequate amounts of essential nutrients b. regularly engage in aerobic exercise
c. reduce caloric intake d. consume a balanced diet e. trim daily carbohydrates back to
less than 20 grams per day


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27. (Points: 0)
 The main waste product of aerobic respiration is
a. hydrogen peroxide. b. glucose. c. water. d. carbon dioxide. e. electrons.


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28. (Points: 0)
 Animals that use their body surface for gas exchange must




 a. have a high ratio of body surface area to volume. b. be aquatic and ne arly spherical. c.
have a special kind of hemoglobin. d. have a low ratio of body surface area to volume. e.
be terrestrial.


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29. (Points: 0)
 Which of the following is not a characteristic of fish gills?




 a. They have a thin epithelium. b. They have a huge surface area. c. They represent
extensions of the body surface. d. They have a poor blood supply. e. They exhibit a
countercurrent flow of blood and water.


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30. (Points: 0)
 The tracheal system of an insect is most like which of the following?




 a. the electrical wiring in a home b. the exhaust system of an automobile c. leaves on a
tree d. the air duct system in a building e. a river system draining a large region


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31. (Points: 0)
 Which of the following is not a function of the nasal cavities in humans?




 a. warming of inhaled air b. filtering of inhaled air c. sampling of inhaled air for odors d.
secretion of excess carbon dioxide into exhaled air e. humidification of inhaled air


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32. (Points: 0)
 Why do cigarette smokers cough more than nonsmokers?




 a. The tar in cigarette smoke tends to make alveoli stick closed. Coughing opens them. b.
Cigarette smoking partially paralyzes the muscles in the lungs, resulting in an increased
residual volume. Coughing exchanges this "dead air." c. Cigarette smoke harms the cilia
that normally move debris out of the lungs. Coughing is the remaining way to clean the
lungs. d. By raising the pressure in the lungs, coughing forces more oxygen into the
blood. e. Coughing stimulates blood flow to the lungs.


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33. (Points: 0)
 Compared to the vital capacity, how much air can lungs actually hold?




 a. always the same amount b. always more c. sometimes less d. sometimes more e.
always less


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34. (Points: 0)
 Which of the following statements about inhalation in birds is false?
 a. Both the anterior and posterior sacs expand. b. The lungs fill with air from the
posterior sacs. c. Both the anterior and posterior sacs fill with air. d. The anterior sacs fill
with stale air from the lungs. e. The anterior sac fills with air as the posterior sacs empty.


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35. (Points: 0)
  When you hold your breath, which of the following blood gas changes leads initially to
the urge to breathe again?




 a. rising carbon dioxide concentration b. rising carbon dioxide concentration and falling
oxygen concentration c. falling oxygen concentration d. falling carbon dioxide
concentration e. rising oxygen concentration


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36. (Points: 0)
 In a mammal, blood leaving the lungs next goes to




a. the liver. b. the brain. c. the kidneys. d. the body in general. e. the heart.


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37. (Points: 0)
 Oxygen is mostly transported through the body




 a. bound to dissolved iron. b. dissolved in the blood. c. dissolved in red blood cells. d.
bound to carbon. e. bound to hemoglobin.


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38. (Points: 0)
 Which of the following does not contribute to gas exchange in the human fetus?
 a. Oxygen is carried through the umbilical cord to the fetus. b. Maternal hemoglobin
releases oxygen more easily than does fetal hemoglobin. c. The placenta keeps the
oxygen levels of amniotic fluid very high. d. Fetal hemoglobin binds oxygen more
readily than does maternal hemoglobin. e. Maternal blood and fetal blood flow next to
each other in the placenta.


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39. (Points: 0)
 Which one of the following statements is false?




 a. Valves in veins and muscle contractions pressing against veins slow down the return
of blood to the heart. b. Gravity tends to pull blood downward into the lower parts of the
body of a terrestrial vertebrate. c. When a corn snake climbs up a tree, it contracts
muscles in its tail. d. A standing giraffe requires a great deal more pressure to pump
blood to its head than an animal with a shorter neck such as a dog. e. Gravity does not
greatly affect aquatic animals.


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40. (Points: 0)
 In an open circulatory system,




 a. there is no heart. b. there is no distinction between blood and interstitial fluid. c. there
is no blood. d. blood flows out of the body. e. there are no blood vessels.


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41. (Points: 0)
 Which one of the following animals has a single circulation?
a. snake b. salmon c. swan d. squirrel e. salamander


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42. (Points: 0)
 During ventricular systole, the __________ valves __________.




 a. AV and semilunar . . . close b. AV . . . close c. AV . . . open d. semilunar . . . close e.
semilunar . . . open


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43. (Points: 0)
 The main function of the AV node is to




 a. initiate the heartbeat. b. relay the signal to contract from the right heart to the left
heart. c. set the rhythm of the heartbeat. d. relay the signal to contract from the right
ventricle to the right atrium. e. relay the signal to contract to the ventricles.


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44. (Points: 0)
 Heart attacks




 a. are the result of angina pectoris. b. result from the death of cardiac muscle cells. c. are
caused by excessive blood pressure in the heart. d. actually cause no permanent damage
to the heart. e. are unrelated to cigarette smoking.


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45. (Points: 0)
  What type of blood vessel is solely responsible for exchange between the blood and the
interstitial fluid?




a. arteriole b. artery c. vein d. capillary e. venule


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46. (Points: 0)
 Cells make up about what percentage of total blood volume?




a. 65% b. 10% c. 45% d. 25% e. 80%


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47. (Points: 0)
 Blood proteins are involved in all of the following activities except




a. blood clotting. b. acting as buffers. c. maintaining salinity. d. fighting infection. e.
maintaining osmotic balance.


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48. (Points: 0)
 What is the most common cause of anemia?




 a. inefficient hemoglobin production b. iron deficiency c. bone marrow cancer d. low
blood pressure e. vitamin deficiency


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49. (Points: 0)
 Which of the following statements about blood clotting is false?




 a. Chemicals released by platelets stimulate cell division in smooth muscle and
connective tissues. b. More than a dozen different clotting factors are involved in the
formation of a scab. c. The first response to an injury is dilation of the damaged blood
vessels. d. Threads of fibrin trap blood cells and platelets during clot formation. e. During
the clotting response, platelets rapidly adhere to exposed connective tissue in the walls of
damaged blood vessels.


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50. (Points: 0)
 Cancer of white blood cells is called




a. erythropoiesis.

				
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