Chapter 21 Questions missed

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42) Antibodies do not
a) link antigen molecules together.
b) neutralize antigens by binding to regions of an antigen that can be pathogenic.
c) bind to enemy cells, thus changing their shape so their complement-binding sites are exposed.
d) differentiate into memory antibodies.
e) bind antigen molecules of two or more enemy cells and stick them together.

d) differentiate into memory antibodies.

25) Complement C3b protein coats bacteria and stimulates phagocytosis by ___ in a process called _______.
a) lymphocytes and monocytes; opsonization
b) neutrophils and macrophages; cytolysis
c) mast cells and basophils; opsonization
d) mast cells and basophils; cytolysis
e) neutrophils and macrophages; opsonization

e) neutrophils and macrophages; opsonization

37) Antigen-presenting cells usually display processed antigens to T cells in
a) plasma.
b) lymph nodes.
c) thymus.
d) red bone marrow.
e) liver.

b) lymph nodes.

109) Helper T cells do all of the following, except
a) Enhance nonspecific defenses.
b) Stimulate T-cell divisions that produce memory T cells and accelerate maturation of cytotoxic T cells.
c) Promote B-cell division, plasma cell maturation, and antibody production.
d) Attract and stimulate the activity of NK cells.
e) Encode the antigenic genetic information for use during future exposures to the antigen.

e) Encode the antigenic genetic information for use during future exposures to the antigen.

168) The process by which antibodies bind to antigenic sites on viruses or toxins, rendering them incapable of binding to other cells, is called ________.
a) Neutralization
b) Opsonization
c) Killing
d) Processing

a) Neutralization

28) Vaccination stimulates
a) natural active immunity.
b) artificial active immunity.
c) natural passive immunity.
d) artificial passive immunity.
e) artificial specific immunity.

b) artificial active immunity.

23) All these cellular agents participate in inflammation except
a) cytotoxic T cells.
b) helper T cells.
c) eosinophils.
d) neutrophils.
e) endothelial cells.

a) cytotoxic T cells.

52) Autoimmune diseases are disorders in which the immune system fails to distinguish ____________ from foreign ones.
a) self-immunoglobulins
b) self-antibodies
c) self-antigens
d) self-interleukins
e) self-complement proteins

c) self-antigens

105) Which of the following is false of human leukocyte antigens (HLA)?
a) bind antigenic material, when present, for presentation to lymphocytes
b) help promote the immune response
c) can be divided into two major classes
d) are found on all human cells with a nucleus.
e) allow the body to differentiate its own cells from foreign cells

b) Help promote the immune response

125) Dividing lymphocytes can be found in the ________ of the lymphoid nodule.
a) central core
b) core
c) germ center (central zone)
d) both B and C
e) all of the above

c) germ center (central zone)

39) __________ participate in both nonspecific resistance and immune response.
a) Memory T (TM) cells
b) Regulatory T (TR) cells
c) Natural killer (NK) cells
d) Helper T (TH) cells
e) Cytotoxic T (TC) cells

d) Helper T (TH) cells

110) During a primary humoral response to antigens all of the following occur, except
a) Neutrophils invade the surrounding areas, releasing chemotactic substances.
b) The first immunoglobulins to appear in circulation are of the IgM type.
c) Antibody levels do not peak until 1 to 2 weeks after the initial exposure.
d) B cells may undergo several rounds of mitosis before producing plasma cells and memory cells.
e) B cells may differentiate into plasma cells

a) Neutrophils invade the surrounding areas, releasing chemotactic substances.

71) The body's nonspecific defenses include all of the following, except
a) Antibodies.
b) Inflammation.
c) Complement.
d) The skin.
e) Interferon.

a) Antibodies.

50) Beta cell destruction that causes type 1 diabetes mellitus is a(n)
a) anaphylactic hypersensitivity.
b) type IV (delayed) hypersensitivity.
c) type III (immune complex) hypersensitivity.
d) type II (antibody-dependent cytotoxic) hypersensitivity.
e) type I (acute) hypersensitivity.

b) type IV (delayed) hypersensitivity.

1) The serum used for emergency treatment of snakebites stimulates
a) artificial passive immunity.
b) artificial active immunity.
c) natural passive immunity.
d) natural active immunity.
e) artificial specific immunity.

a) artificial passive immunity.

24) These are a group of proteolytic enzymes secreted by natural killer (NK) cells.
a) selectins
b) cytokines
c) granzymes
d) perforins
e) interferons

c) granzymes

and complement, rendering it more likely to be phagocytized, is called ________.
a) Neutralization
b) Opsonization
c) Killing
d) Processing
e) precipitation

b) Opsonization

116) Autoantibodies
a) Function against the body's normal antigens.
b) Are important in tissue rejection reactions.
c) Are produced during an allergic reaction.
d) Are produced during immunodeficiency diseases.
e) Are produced by activated T cells.

a) Function against the body's normal antigens.

82) Immunity that is genetically determined and present at birth is called ____ immunity.
a) natural passive
b) passive
c) active
d) auto
e) innate

) innate

104) The role of accessory cells in immunity is to
a) Produce memory cells.
b) Digest foreign cells and molecules and present antigens.
c) Produce antibodies.
d) Coat pathogens with antigens.
e) Actively lyse bacterial cells.

b) Digest foreign cells and molecules and present antigens.

83) Immunity that results from the natural exposure to an antigen in the environment is
a) Active immunity.
b) Auto immunity.
c) natural passive immunity.
d) passive immunity.
e) innate immunity.

a) Active immunity.

26) ________________ are antimicrobial proteins.
a) Bradykinins
b) Interferons
c) Cytokines
d) Kinins
e) Prostaglandins

b) Interferons

151) In an experiment, Roger injects some mice with interleukin II, and after 3 days he examines the blood and lymph for changes. What would you expect to observe following this treatment?
a) decreased number of B cells
b) decreased number of T cells
c) increased number of mast cells
d) increased number of T cells
e) both A and D

d) increased number of T cells

96) The various classes of immunoglobulins are differentiated on the basis of their
a) Variable regions.
b) Shapes.
c) Affinity for antigens.
d) Fixed segments.
e) both B and C

d) Fixed segments

74) The release of interleukin-1 by active macrophages would
a) Produce a fever.
b) Cause inflammation.
c) Result in opsonization of pathogens.
d) Result in B-cell producing antibodies.
e) Activate complement.

a) produce a fever

56) Compared to blood capillaries, lymph capillaries exhibit all of the following, except that they
a) Are frequently irregular in shape.
b) Are larger in diameter.
c) Are not held in place by a loose connective-tissue framework.
d) Have no basement membrane.
e) Have walls of endothelial cells that overlap like shingles.

c) Are not held in place by a loose connective-tissue framework.

78) Microphages include
a) Neutrophils.
b) Microglia.
c) Monocytes.
d) Langerhans cells.
e) Kupffer cells.

a) Neutrophils

43) the correct sequence of events in the humoral immune response is.
a) antigen recognition, antigen presentation, differentiation, clonal selection, attack
b) antigen recognition, antigen presentation, clonal selection, differentiation, attack
c) antigen presentation, antigen recognition, clonal selection, differentiation, attack
d) antigen presentation, antigen recognition, clonal selection, attack differentiation
e) antigen recognition, differentiation, antigen presentation, clonal selection, attack

b) antigen recognition, antigen presentation, clonal selection, differentiation, attack

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