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immunology final
final
66
Biology
Undergraduate 4
07/04/2010

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Term
Antibodies that increase phagocytosis are called
Definition
opsonins
Term
Based on antigenic differences in ____chains, antibodies have been divided into the following classes
Definition
C (H) chains
Term
Quantitatively the second largest class of immunoglobulins in human serum is
Definition
IgA
Term
IgA immunoglobin occurs in
Definition
serum, mucous secretions, saliva, urine, gastrointestinal and genitourinary tracts, and human milk
Term
IgM immunoglobulins are the ___ antibodies to be detected after the injection of an antigen, highly lethal to __________ bacteria in C', and play an important _____ role in the early stages of infection
Definition
first; gram negative; protective
Term
Antibodies are chiefly excreted by
Definition
lymphocytes (b cells that have become plasma cells)
Term
According to current ideas about the macrophage, its role in Ab synthesis may be to act as an ____ cell to which the Ag, B c, and Tc can act together.
Definition
APC
Term
List 4 tests that detect Ab in serum.
Definition
1. Precipitation reaction 2. Agglutination reaction 3. Complement fixation test 4. IFA test
Term
In relation to in vitro measurement of cellular immunity it can be stated that in the presence of a specific antigen, sentitized Tc release a ___; migration of MO from a capillary tube is _____by the substance, and ____ is produced only by sensitized Tc.
Definition
Soluble substance; inhibited; MIF
Term
in vivo
Definition
in animal
Term
in vitro
Definition
test tube
Term
In relation to in vivo measurement of cellular immunity, it can be stated that it aids in the ____ of many infectious diseases, an ____ is injected into the skin of a sensitized individual and the intensity of the reaction is observed, but a person who has never been in contact with the Ag will show _____.
Definition
diagnosis; antigen; no reaction
Term
In the presence of Ag, sensitized T lymphocytes (TdH) produce a chemotactic factor that will attract
Definition
macrophages, eosinophils, mast cells, and neutrophils
Term
Cellular immmunity can be passive transferred via
Definition
Transfer of T lymphoctes (TF)
Term
What can be used to prevent the rejection of a transplanted organ?
Definition
Immunosuppressive drugs
Term
Vaccines consist of
Definition
killed pathogenic organisms, living avirulent organisms, and formulin-treated exotoxins (??)
Term
Reduction of circulating neutrophils at the time of induction of an Arthus rection
Definition
leads to suppression or decrease of the reaction
Term
What immunoglobulin class is concerned with sensitization of man for local and systemic anaphylactic reactions
Definition
IgE
Term
The release of vasoactive amines by antigens results from the sensitization of _________ with anaphylactic Ab bound to its cell membrane
Definition
Mast cells
Term
Arthus reaction can be transferred passively by
Definition
serum from immune animals
Term
List 4 diagnostic tests useful in establishing whether in immune deficiency state is dues to a Tc or a Bc defect:
Definition
1.
Term
List 4 diagnostic tests useful in establishing whether an immune deficiency state is due to a Tc or Bc defect.
Definition
(???) 1. Serum immunoglobulin levels (Bc) 2. Skin tests for common allergies (Tdh) 3. Lymphocyte stimulation by non-specific mitogens 4. Skin tests for common fungi
the other option that I think is wrong, but don't know for sure: serum complement levels
Term
An animal is immunized with an innoculum of allogenic tumor cells which are promptly rejected by an adequate immune response. When tumor cells bearing the same H2 Ag as the immunized cells are mixed in vitro, in the absence of added complement, with spleen B cells from the immunized animals, the target cells are killed by
Definition
sensitized thymus derived (t) cells
Term
Delayed hypersensitivity between syngenetic guinea pigs can be transferred passively from a sensitized subject to a normal subject with
Definition
Thymus derived peripheral lymphocytes and Transfer factor
Term
Which biological funtion(s) as a result of complement fixation is produced by the enzymatic action of C3 convertase only
Definition
Opsonization and chemotaxis of neutrophils
Term
The inflammatory infiltrate which characterizes delayed hypersensitivity reaction is constituted by
Definition
very few specifically sensitized lymphocytes and many macrophages with few other lymphocytes
Term
In the fixation of C' by the classical pathway, ___ Ab are more efficient than IgG, ___ does not fix C', ___ is recognition unit for IgM and IgG.
Definition
IgM; IgA; C1q
Term
Neonatal thymectomy in a mouse may result inmarked _______ in circulating lymphocytes, marked ____ in the population of paracortical lymphocytes, and marked ____ or homograft or allograft rejection.
Definition
decrease; decrease; impairment
Term
The mode of action of antihistamines in relieving the symptoms of allergy is by
Definition
blocking histamine binding to cell membranes
Term
Limited digestion of the IgG molecule by pepsin results in
Definition
F(ab')2
Term
Hybridomas are produced by union of the nuclei of a myeloma tumor cell and
Definition
spleen B lymphocyte
Term
What organic group is not immunogenic?
Definition
lipid (it isn't charged)
Term
The stem cells for B and T lyphocytes populations are found in
Definition
the red bone marrow
Term
The male heterozygous for Rh factor mates with and Rh negative female. On the basis of genetic theory, it could be predicted that ___ of offspring would be Rh positive.
Definition
50%
Term
Immunogenetic control determines the amount of __ formed, response to an ___, particular class of ___ formed, and ____ of receptor.
Definition
Ab, Ag, Ab, Affinity
Term
The secondary antibody response to a protein differs from the primary immune response in the amount of ___ formed, ___ period between Ag injection and height of humoral response, and the ____ of Ag induced response.
Definition
Ab; lag; specificity
one not chosen: susceptibility of immunosuppressive agents.
Term
What type of reaction is tuberculin test?
Definition
Type IV
Term
What type of reaction is asthma?
Definition
Type I (Anaphylactic)
Term
What type of reaction is glomerulonephritis?
Definition
Type III (immune complex)
Term
What type of reaction is a reaction to an insect sting?
Definition
Type I (anaphylaxis) reaction
Term
What kind of reaction is a transfusion reaction?
Definition
Type II (Cytotoxic) reaction
Term
hat kind of reaction is serum sickness?
Definition
Type III (Immune Complex) reaction
Term
What kind of reaction required IgE?
Definition
Type I (anaphylactic) reaction
Term
What type of reaction is an arthus reaction?
Definition
Type III (Immune complex) Reaction
Term
What type of reaction is tumor cell surveillance?
Definition
Type IV (cell-mediated) reaction
Term
What is the largest immunoglobulin in molecular weight?
Definition
IgM
Term
What Ab class is capable of crossing the placenta?
Definition
IgG
Term
What Ab class is in the greatest concentration in plasma?
Definition
IgG
Term
What Ab class is first produced in response to antigen?
Definition
IgM
Term
What Ab class plays an important role in blood (ABO) transfusion reactions
Definition
IgM
Term
What Ab class is involved primarily in atopy allergic disease
Definition
IgE
Term
What Ab class possesses a secretory componen?
Definition
IgA
Term
What Ab class is present in plasma only in trace amounts (B cell bound)
Definition
IgD
Term
What Ab class provides mucosal immunity?
Definition
IgA
Term
What two antibody classes activate complement by the Classical pathway?
Definition
IgG and IgM
Term
The opsonin complement fragment that causes microorganism to better adhere to neutrophiles and macrophages?
Definition
C3b
Term
Complement component found in greatest concentration in plasma?
Definition
C3
Term
Complement fragment most important for neutrophil chemotaxis
Definition
C5a
Term
Anaphylatoxins I and II are complement fragments
Definition
C3a and C5a
Term
Alternative pathway bypasses complement components ____
Definition
C1, C4, C2
Term
___ competes with Factor B for binding to C3b and can also dissociate C3b,Bb
Definition
Factor H
Term
complement components which are bacteriocidal to Gram-negative bacteria
Definition
MAC (C5b-C9)
Term
C1 is composed of __, __, and ___ parts head together by the metal ion ___.
Definition
C1q, C1r, C1s, Ca2+
Term
____ enzyme converts Factor B to Bb in Alternative pathway
Definition
Factor D
Term
The complement complex for C3 convertase via the Classical complement pathway is ________
Definition
C4b,2a (enz) and Mg2+
Term
The complement complex for C5 convertase via the Alternative complement pathway is ___
Definition
C3b,Bb (enz), 3b
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