front 1 Which of these lymphoid organs destroys bacteria before it can breach the intestinal wall and generates "memory" lymphocytes for long-term memory? Select from letters A-D. A B C D | back 1 D |
front 2 True and False: Chyle is delivered to the blood via the lymphatic system. | back 2 True |
front 3 Which of the following statements is true regarding veins versus lymphatic collecting vessels? Veins and lymphatic vessels have a different number of tunics. Veins have thinner walls than do lymphatic vessels. Veins tend to form more branches (anastamoses) than do lymphatic vessels. Veins have fewer internal valves than do lymphatic vessels. | back 3 Veins have fewer internal valves than do lymphatic vessels. |
front 4 Which of the following lymphoid tissues/organs does NOT contain reticular connective tissue? lymph nodes spleen tonsils thymus | back 4 Thymus |
front 5 When the lymphatic structures of a limb are blocked due to tumors, the result is ________. severe localized edema distal to the blockage of that limb abnormally high lymph drainage from the distal region increased pressure in the lymphatics proximal in the limb to the blockage shrinkage of tissues distal in the limb to the blockage due to inadequate delivery of lymph | back 5 severe localized edema distal to the blockage of that limb |
front 6 Which of the following lymphoid cells secrete antibodies? T lymphocytes plasma cells macrophages dendritic cells | back 6 Plasma cells |
front 7 Which of the following is not a normal component of lymph? ions red blood cells plasma proteins water | back 7 Red blood cells |
front 8 Which of the following is NOT a lymphoid tissue/organ? bone marrow tonsils Peyer's patches spleen | back 8 Bone marrow |
front 9 Once collected, lymph is returned to __________. the liver for detoxification venous circulation the kidneys for filtration arterial circulation | back 9 Venous circulation |
front 10 Which of the following is not a part of the lymphatic system? lymphatic vessels lymph lymph nodes erythrocytes | back 10 Erythrocytes |
front 11 Which lymphoid organ extracts aged and defective blood cells and platelets from the blood in addition to storing some of the breakdown products for later reuse? Select from letters A-D. A B C D | back 11 C |
front 12 The __________ is (are) the most likely to become infected. lingual tonsil palatine tonsils pharyngeal tonsil tubal tonsil | back 12 Palatine tonsils |
front 13 Which of the following lacks lymph capillaries? loose connective tissues skin small intestine bones and teeth | back 13 Bones and teeth |
front 14 Lymph nodes are surrounded by a capsule from which connective tissue strands extend inward to divide the node into compartments. What is the name of these strands? lymph sinuses trabeculae medullary cords hilum | back 14 Trabeculae |
front 15 Where is the spleen located? left side of the abdominal cavity just beneath the diaphragm and curled around the anterior aspect of the stomach clusters of lymphoid follicles located in the wall of the distal portion of the small intestines forming a ring of lymphoid tissue around the entrance to the pharynx (throat) inferior neck and extending into the superior thorax, partially overlying the heart deep to the sternum | back 15 left side of the abdominal cavity just beneath the diaphragm and curled around the anterior aspect of the stomach |
front 16 Which of the following is NOT a lymphatic cell? dendritic cell eosinophil macrophage reticular cell | back 16 Eosinophil |
front 17 What type of tissue is commonly found in all lymphoid organs and tissues (except the thymus)? elastic cartilage connective tissue elastic connective tissue reticular connective tissue areolar connective tissue | back 17 reticular connective tissue |
front 18 Which lymphoid organ is primarily active during the early years of life? Select from letters A-D. A B C D | back 18 B |
front 19 Where are worn-out erythrocytes found in the spleen? splenic cords red pulp capsule white pulp | back 19 Red pulp |
front 20 What is the main function of the lymphatic system? The lymphatic system regulates blood pressure through the renin-angiotensin-aldosterone mechanism. The lymphatic system returns leaked fluid and plasma proteins that escape from the bloodstream to the blood. The lymphatic system pumps and transports blood throughout the body. The lymphatic system makes blood cells through a process known as hematopoiesis. | back 20 The lymphatic system returns leaked fluid and plasma proteins that escape from the bloodstream to the blood. |
front 21 Antibodies are produced by __________. reticular cells macrophages dendritic cells plasma cells | back 21 Plasma cells |
front 22 True or False: The lymphatic capillaries function to absorb the excess protein-containing interstitial fluid and return it to the bloodstream. | back 22 True |
front 23 Select the correct statement about lymph transport. Lymph transport is only necessary when illness causes tissue swelling. Under normal conditions, lymph vessels are very high-pressure conduits. Lymph transport is faster than that occurring in veins. Lymph transport depends on the movement of adjacent tissues, such as skeletal muscles. | back 23 Lymph transport depends on the movement of adjacent tissues, such as skeletal muscles |
front 24 True or False: When tissues are inflamed, lymphatic capillaries develop openings that permit uptake of large particles such as cell debris, pathogens, and cancer cells. | back 24 True |
front 25 Lymph is most similar to __________. interstitial fluid blood plasma saliva water | back 25 Interstitial fluid |
front 26 True or False: Some immunocompetent cells will never be called to service in our lifetime. | back 26 True |
front 27 Which mechanism of antibody action results in cell lysis? agglutination complement fixation and activation precipitation neutralization | back 27 Complement fixation and activation |
front 28 True or False: Cellular ingestion and destruction of particulate matter is called phagocytosis. | back 28 True |
front 29 Which of the following do NOT serve as antigen-presenting cells (APC)? B cells natural killer cells macrophages dendritic cells | back 29 Natural killer cells |
front 30 True or False : Adaptive immunity is provided only by lymphocytes that secrete antibodies. | back 30 False |
front 31 The process whereby neutrophils and other white blood cells are attracted to an inflammatory site is called ________. phagocytosis chemotaxis diapedesis margination | back 31 Chemotaxis |
front 32 What is the role of interferon in defense against disease? activates the complement mechanism activates the inflammatory process protects cells that have not yet been infected by viruses to kill the bacteria | back 32 Protects cells that have not yet been infected by viruses |
front 33 Immunocompetence ________. prevents intercellular communication so that only specific cell types respond to the invader is the ability of individual cells to recognize a specific antigen by binding to it occurs in one specific organ of the adaptive immune system requires exposure to an antigen | back 33 is the ability of individual cells to recognize a specific antigen by binding to it |
front 34 True or False: Substances capable of triggering the adaptive immune system and provoking an immune response are called antigens. | back 34 True |
front 35 Which of the following mechanisms of antibody action occur when red blood cells clump due to a transfusion of mismatched blood? agglutination complement fixation and activation neutralization precipitation | back 35 Agglutination |
front 36 Which cells mature in the thymus? memory cells T cells effector cells B cells | back 36 T cells |
front 37 Which of the following best illustrates artificially acquired active humoral immunity? infection vaccines antibodies received in breast milk antivenoms | back 37 Vaccines |
front 38 Which of the following is not a function of the inflammatory response? replaces injured tissues with connective tissue prevents the spread of the injurious agent to nearby tissue sets the stage for repair processes disposes of cellular debris and pathogens | back 38 Replaces injured tissues with connective tissue |
front 39 __________ immunity protects a baby who is fed breast milk. Artificial passive Natural passive Natural active Artificial active | back 39 Natural passive |
front 40 How does a lymphocyte become immunocompetent? Lymphocytes rapidly proliferate to form an army of cells exactly like themselves and bearing the same antigen-specific receptors. Lymphocytes must be able to recognize their one specific antigen by binding to it. An antigen binds to a particular lymphocyte that has a receptor for it. Lymphocytes must be relatively unresponsive to self-antigens so that they do not attack the body's own cells. | back 40 Lymphocytes must be able to recognize their one specific antigen by binding to it. |
front 41 True or False: Fever is seldom beneficial because it speeds up the cellular metabolic rate and will not allow antigen-antibody reactions to occur. | back 41 False |
front 42 __________ are lymphocytes that directly kill virus- infected cells. Macrophages B cells Cytotoxic T cells Helper T cells | back 42 Cytotoxic T cells |
front 43 Antigens bound to MHC II activate __________. macrophages cytotoxic T cells helper T cells B cells | back 43 Helper T cells |
front 44 What are B and T cells called that have not yet been exposed to an antigen? self-tolerant naive clone immunocompetent | back 44 Naive |
front 45 Which defense mechanism results in redness, heat, pain, and swelling? antibody production phagocytosis inflammation cell-mediated immunity | back 45 Inflammation |
front 46 Which mechanism occurs when antibodies block specific sites on viruses or bacterial exotoxins? neutralization agglutination precipitation complement fixation and activation | back 46 Neutralization |
front 47 Which of the following is an effect of complement activation? T cell activation tissue repair opsonization fever | back 47 Opsonization |
front 48 Which of the following is (are) NOT a part of the innate immune defenses? inflammation T cells fever natural killer (NK) cells | back 48 T cells |
front 49 What mobilizes the adaptive defenses and provokes an immune response? antigens MHC proteins pyrogens interferons | back 49 Antigens |
front 50 Cancer cells and virus-infected body cells can be killed before activation of adaptive immunity by ________. pinocytosis B lymphocytes natural killer cells T lymphocytes | back 50 Natural killer cells |
front 51 Which of these lymphoid organs is the thymus? Select from letters A-D. A | back 51 B |
front 52 True or False: There are more efferent lymphatic vessels leaving a lymph node than there are afferent vessels entering a lymph node. | back 52 False |
front 53 The filtration of lymph and immune system activation are the two basic functions of the __________. lymph nodes | back 53 Lymph nodes |
front 54 Which of these lymphoid organs is a part of collection of tissues called the mucosa-associated lymphoid tissues (MALT) and removes pathogens entering the pharynx (throat)? Select from letters A-D. A | back 54 A |
front 55 Which part of the spleen is the site of immune function? red pulp | back 55 White pulp |
front 56 Lymph capillaries are absent in all except which of the following? bone marrow | back 56 Digestive organs |
front 57 True or False: Like blood, lymph flows both to and from the heart | back 57 False |
front 58 Which of the following is a role of lymph nodes? They filter lymph. | back 58 They filter lymph |
front 59 Select the correct statement about lymphocytes. B cells produce plasma cells, which secrete antibodies into the blood. T cells are the precursors of B cells. T cells are the only form of lymphocyte found in lymphoid tissue. The two main types are T cells and macrophages. | back 59 B cells produce plasma cells, which secrete antibodies into the blood. |
front 60 True or False: Because lymph vessels are very low-pressure conduits, movements of adjacent tissues are important in propelling lymph through the lymphatics. | back 60 True |
front 61 True or False: The directional movement of cells in response to chemicals is called chemotaxis. | back 61 True |
front 62 B lymphocytes develop immunocompetence in the ________. lymph nodes | back 62 Bone marrow |
front 63 True or False: Virus infected cells secrete complement to "warn" other cells of the presence of virus. | back 63 False |
front 64 Which of the following is a part of the second line of defense against microorganisms? gastric juice | back 64 Phagocytes |
front 65 Which of the following is not characteristic of the adaptive immune system? It is specific for a given organ. | back 65 It is specific for a given organ. |
front 66 Innate immune system defenses include ________. phagocytosis | back 66 Phagocytosis |
front 67 Which of the following statements regarding NK cells is a false or incorrect statement? NK cells attack cancer cells and virus-infected body cells. NK cells attack cells that display abnormal MHC antigens. NK cells are present in the blood, spleen, lymph nodes, and red bone marrow. NK cells are a type of neutrophil. | back 67 NK cells are a type of neutrophil. |
front 68 Complement proteins and antibodies coat a microorganism and provide binding sites, enabling macrophages and neutrophils to phagocytize the organism. This phenomenon is termed ________. opsonization | back 68 Opsonization |
front 69 How do interferons protect against infection in healthy cells? Interferons perform complement activation. Interferons promote fever, or an abnormally high body temperature. Interferons perform opsonization to coat microorganisms. Interferons block viral reproduction in healthy cells through the production of antiviral proteins. | back 69 Interferons block viral reproduction in healthy cells through the production of antiviral proteins. |
front 70 What is the specific target of interferons? specific viruses | back 70 Nearby healthy cells |