IgA is characterized by the following EXCEPT:
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11%
it may exist in monomaniac or dimmer form
7%
It provides immunity at mucosal surface
7%
It is protected from proteolytic cleavage by secretory piece
75%
it can cross the placental barrier.
The secretory component of IgA is synthesized by:
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79%
Local mucosal cells
14%
B-cells
0%
Endothelial cells
7%
Plasma cells
The main antibody in secretions protecting outer surfaces of mucosal membranes are:
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10%
IgA and IgE
3%
IgE and IgD
7%
IgM and IgG
69%
IgA
10%
IgA and IgM
The following immunoglobulin provides local immunity at the mucosal surfaces:
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3%
IgM
0%
IgD
94%
IgA
3%
IgG
0%
IgE
All of the following are examples of how acquired immunity can help innate immunity EXCEPT:
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8%
Macrophage activation by Th1 celis
50%
Antigen presentation to T cells
17%
NK cell activation by IL-2 to give LAK cells
8%
Antibody-mediated opsonization
17%
ADCC
Immunoglobulin class switching is mediated by a change in;
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76%
Constant domains of heavy chains
4%
Constant domains of light chains
12%
Variable domain of heavy chain
8%
Constant domain of both heavy and light chain
Regarding the primary immune response:
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12%
There is a very short induction (lag) period
84%
Immunoglobulins produced are mainly of IgM class
4%
Memory cells are the main effector cells
0%
The induced antibody level is very high
In primary immune response:
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11%
There is a short induction period
82%
There is no memory cells
4%
The predominant immunoglobulin IgG
4%
The antibody level is very high
The monoclonal antibody is characterized by the following EXCEPT:
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7%
Highly specific
79%
- Produced by different clones or B cells
7%
Can be artificially produced
7%
Can be used in diagnosis or therapy
Which antibody provides local Immunity at the mucosal surfaces:
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97%
IgA
0%
IgD
0%
IgE
3%
IgG
Which surface molecule delivers the first signal for B-cell activation
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71%
B cell receptor
6%
B7
15%
CD40
9%
MHCI
هينزل باقي أسئلة GIT من كتاب القسم لو عايز ترجع لباقي الأسئلة اضغط هنا!
45-" Larva currens" is the name given to the migrating larva of:
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9%
a) Ancylostoma duodenale
2%
b) Trichostrongylus colubriformis
86%
c) Strongyloides stercoralls
3%
d) Capillaria philippinensis
46- Concerning ancylostomiasis duodenale, which of the following is infective:
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3%
a) Mature Egg
86%
b) Filariform larva
11%
c) Rhabditiform larva
1%
d) Adult worm
47- A patient presenting with chronic diarrhoea, with history of eating improperly cooked whole infected fish, may be infected with:
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2%
a) Enterobius vermicularis
2%
b) Echinococcus granulosus
2%
c) Ascaris lumbricoides
94%
d) Capillaria philippinensis
48-Walking barefooted poses a risk of acquiring:
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3%
a) Trichostrongyliasis
4%
b) Visceral larva migrans
91%
c) Ancylostomiasis
2%
d) Intestinal capillariasis
49-Disseminated systemic infection in AIDS patient is reported with:
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7%
a) Trichostrongyliasis
9%
b) Enterobiasis
5%
c) Ancylostomiasis
80%
d) Strongyloidiasis