7171368
Descripción
Test por Alexandra Bozan, actualizado hace más de 1 año
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Creado por Alexandra Bozan
hace más de 7 años
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Pregunta 1
Pregunta
Genetic characteristics of the human species that protects the body from certain pathogens
Respuesta
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chemical barriers
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microbial flora
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species resistance
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mechanical barriers
Pregunta 2
Pregunta
An immunoglobulin, or antibody molecule, consists of
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two heavy and two light polypeptide chains
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four heavy and two light polypeptide chains
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two heavy and four light polypeptide chains
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four heavy and four light polypeptide chains
Pregunta 3
Pregunta
All of the following represent examples of nonspecific immune defenses except
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species resistance
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phagocytosis
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cell-mediated immunity
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mechanical and chemical barriers
Pregunta 4
Pregunta
The most abundant circulating antibody, the one that normally makes up about 75% of all the antibodies in the blood, is
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IgG
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IgA
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IgE
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IgM
Pregunta 5
Pregunta
A large antibody with 10 binding sites
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IgE
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IgD
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IgM
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IgA
Pregunta 6
Pregunta
Which of the following can activate a naive B cell
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Binding to its specific antibody
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Binding to its specific antigen
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All B cells are activated when an infant is born
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All of the above
Pregunta 7
Pregunta
Which of the following is not a characteristic of inflammation?
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Heat
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Redness
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Swelling
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Pain
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All of the above are characteristics of inflammation.
Pregunta 8
Pregunta
15% of the lymphocytes are made of these nonspecific killer cells:
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helper T cells
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cytotoxic T cells
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B cells
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NK cells
Pregunta 9
Pregunta
The amount of antibodies in a person’s blood is expressed as:
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toxoid
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titer
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both toxoid and titer
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none of the above
Pregunta 10
Pregunta
The type of immune mechanism that provides a general defense by acting against anything recognized as “not self” is called
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nonspecific immunity
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specific immunity
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adaptive immunity
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acquired immunity
Pregunta 11
Pregunta
The MHC antigen is important in helping the immune system identify [blank_start]self[blank_end] [blank_start]cells[blank_end].
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self
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cells
Pregunta 12
Pregunta
The complement system can be activated by
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the binding of complement protein 1 to the complement-binding site on the antibody molecule.
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the binding of complement protein 3 to bacteria or viruses in the presence of properdin.
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nonspecific immune mechanisms
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all of the above
Pregunta 13
Pregunta
In the first stage of their development, B cells are known by following term: plasma B cells.
Respuesta
- True
- False
Pregunta 14
Pregunta
Complement system is not a chemical barrier
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- True
- False
Pregunta 15
Pregunta
This substance can destroy pathogens by lowering the pH to a level where they cannot function: [blank_start]Hydrochloric[blank_end] [blank_start]acid[blank_end]
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Hydrochloric
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acid
Pregunta 16
Pregunta
Memory B cells form plasma B cells upon rexposure to same antigen.
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- True
- False
Pregunta 17
Pregunta
The antibody commonly found in tears, saliva and on mucous membranes is [blank_start]IgA[blank_end].
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IgA
Pregunta 18
Pregunta
Pyrogens play an important role in raising the thermostat and triggering fever.
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- True
- False
Pregunta 19
Pregunta
Specific immunity is controlled by two classes of lymphocytes called [blank_start]T[blank_end] [blank_start]cells[blank_end] and [blank_start]B[blank_end] [blank_start]cells[blank_end].
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T
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cells
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B
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cells
Pregunta 20
Pregunta
The most numerous type of phagocyte is the [blank_start]neutrophil[blank_end].
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neutrophil
Pregunta 21
Pregunta
John was immunized against most of the childhood diseases. What type of immunity results:
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artificially acquired active immunity
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passive immunity
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nonspecific immunity
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general immunity
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This is not considered an example of immunity
Pregunta 22
Pregunta
Also known as killer lymphocytes
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NK cells
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cytotoxic T cell
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Prostaglandins
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Platelets
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NK cells and cytotoxic T cell
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