A "foreign" molecule which can invoke the immune response is called a(n)
a) Colony?stimulating factor
b) Immunoglobulin
c) Hapten
d) Antigen
e) Antibody
D
Active artificially acquired immunity is a result of
a) Injection of an immune serum
b) Antibodies passed on from mother to baby through breast milk
c) Vaccination
d) Antibodies passed on from mother to fetus through the placenta
e) Contact with a pathoge
C
Antibodies are produced in cells called
a) Natural killer cells
b) Helper T?cells
c) Plasma cells
d) Beta cells
e) Memory cells
C
Complement proteins work by
a) Producing antibodies
b) Phagocytosis of target cells
c) Neutralization of antigens
d) Creating an impermeable barrier
e) Forming pores in the membranes of target cells
E
Cytotoxic T cells kill target cells
a) By phagocytosis
b) By secreting antibodies
c) Through insertion of perforins into the targets membrane
d) By releasing oxidizing agents
e) Through injection of tumor necrosis factor
C
Lymphocytes that develop immuno competence in the thymus are
a) B lymphocytes
b) Nk cells
c) T lymphocytes
C
Saliva and lacrimal fluid contain this enzyme that destroys bacteria
a) Lysozyme
b) Trypsin
c) Amylase
d) Salivase
e) Pepsin
A
The immune cell that allows for subsequent recognition of an antigen resulting in a secondary response is called a(n)
a) Basophil
b) Memory cell
c) Helper T?cell
d) Plasma cell
e) Antigen?presenting cell
B
The primary mechanism of antibody action is
a) Neutralization
b) Phagocytosis
c) Agglutination
d) Complement activation
e) Precipitation
D
These molecules are secreted by leukocytes and macrophages and result in a fever
a) Pyrogens
b) Keratin
c) Heparin
d) Antibodies
e) Histamine
A
This type of antibody binds to mast cells and basophils, thus invoking inflammation
a) IgA
b) IgG
c) IgM
d) IgD
e) IgE
E
This type of disease results from the inability of the immune system to distinguish self from non?self antigens
a) Anaphylaxis
b) Immunodeficiency
c) SCID
d) Allergy
e) Autoimmune disease
E
When a localized area exhibits increased capillary filtration, hyperemia, and swelling, this is an indication of
a) Antigens are present
b) Antibodies are phagocytizing target cells
c) Inflammation is occurring
d) An immune response is underway
e) Fever i
C
Which cell does not have a direct role in phagocytosis?
a) Neutrophils
b) Kupffer cells
c) Basophil
d) Macrophage
e) eosinophil
C
Which cell phagocytize antigen?bearing cells and bind them to their MHCs?
a) Plasma cells
b) Helper T?cells
c) All immune cells
d) Antigen presenting cells
D
Which cells stimulate both arms of the immune response
a) Killer T?cells
b) Helper T?cells
c) Basophils
d) Plasma cells
e) Complement cells
B
Which nonspecific defense cells specialize in attacking cancer cells and virus?infected cells?
a) Helper T?lymphocytes
b) Natural killer cells
c) Macrophages
d) Plasma cells
e) Basophils
B
Which of the following is a nonspecific barrier defense?
a) Mucous membranes
b) Macrophages
c) Complements
d) Natural killer cells
e) Antibodies
A
Which statement below is a characteristic of a secondary humeral response?
a) It triggers fever
b) It occurs much more rapidly than a primary response
c) It results in less memory cell circulation
d) It results in less antibody secretion
e) It only occurs
B
Which type of molecule is produced by viral?infected cells to communicate to non?infected cells of the presences of A virus?
a) Antigen
b) Interleukin
c) Complement
d) Pyrogen
e) Interferon
E
Which of the following is NOT a surface barrier to pathogen influx?
a) Mucous membranes
b) Complement cascade
c) Saliva and tears
d) Skin secretions
B
Which cells of the innate immune response are responsible for detecting and destroying parasites?
a) Natural killer cells
b) Neutrophils
c) Mast cells
d) Eosinophils
D
Which of the following is NOT one of the cardinal signs of inflammation?
a) Pain
b) Swelling
c) Redness
d) Heat
e) Opsonization
E
The process that begins when a helper T?cell binds to an MHC class II protein on a displaying cell is known as
a) Co-stimulation
b) Self antigen recognition
c) T?cell proliferation
d) Antigen proliferation
A
All of the following are examples of autoimmune disorders EXCEPT
a) Myasthenia gravis
b) Grave's disease
c) Rheumatoid arthritis
d) Systemic lupus erythematosus (SLE)
e) Sickle cell anemia
E
All of the following are examples of characteristics of adaptive defenses EXCEPT
a) They have memory
b) We are born with them
c) They are usually initiated in a lymph node
d) They are specific
e) They are systemic
B
Which of the following is a primary lymphoid organ?
a) Lymph node
b) Tonsil
c) Spleen
d) Thymus
e) Peyer's patch
D
Which of the following is the hallmark of the humeral immune response?
a) Cell lysis by T cells
b) Phagocytes
c) Binding of antibody to the antigen
d) Antigen presentation
e) Interferon production
C
Anaphylactic shock can result from an immediate hypersensitivity where the allergen enters the blood.
TRUE
Perforins are cytolytic chemicals used by NK cells.
TRUE
Regulatory T cells ________.
a) release cytokines that increase the activity of cylotoxic T cells and activated B cells
b)decrease their activity as antigenic stimulus decreases.
c)are the most thoroughly understood T cells
d)may function in preventing au
D
The only immunoglobulin to exist as a pentamer is ________.
A) IgA
B)IgG
C)IgD
D)IgM
D
Which of the following is not characteristic of the adaptive immune system?
A) it is antigen-specific
B) it is specific for a given organ
C) it has memory
D) it is systemic
B
Immunocompetence ________.
A)occurs in one specific organ of the adaptive immune system
B) is the ability of individual cells to recognize a specific antigen by binding to it
C)prevents intercellular communication so that only specific cell types respond
B
Which of the following is true of immediate hypersensitives:
A) also called type IV hypersensitivities
B) are adaptive immune responses to disease organisms
C) include allergic contact dermatitis
D) involve IgE antibodies and the release of histamine from
D
There are over ________ different types of antigen receptors.
A) a billion
B) a thousand
C) a million
D) ten
A