Macrophages perform the following functions EXCEPT:
Anonymous Quiz
3%
Antigen presentation
0%
Phagocytosis
72%
Production of antibodies
10%
Direct cytotoxicity
14%
Secration of cytokines
Which of the following is a primary lymphoid organ:
Anonymous Quiz
97%
Bone marrow
0%
Lymph nodes
3%
Tonsils
0%
Peyer's patches
0%
Spleen
Secondary lymphoid organs include
Anonymous Quiz
0%
Bone marrow
17%
Thymus
69%
Spleen
14%
All of the above
The site of T cell maturation in man is:
Anonymous Quiz
3%
Bone marrow
0%
Lymph nodes
0%
Spleen
97%
Thymus gland
0%
Tonsils
The site of ß cell development in mammals is
Anonymous Quiz
96%
The bone marrow
0%
The bursa of Fabricius
0%
The thymus
0%
The spleen
4%
Lymph nodes
Lymphocytes are activated by antigens in:
Anonymous Quiz
16%
Blood stream
9%
Bone marrow
66%
Lymph nodes
9%
Thymus
Regarding innate immunity, all of the following is true EXCEPT:
Anonymous Quiz
0%
is present in all individuals since birth
0%
Cannot tell the difference between pathogens
96%
Always eliminates infectious organisms successfully
4%
Involves mainly granulocytes
Which of the following statements about B cells is correct:
Anonymous Quiz
0%
They are produced in the spleen
4%
They comprise around 75% of peripheral blood lymphocytes
80%
They are progenitors of plasma cells
16%
They are involved in cell mediated immunity
Which of the following statements about T cells is true:
Anonymous Quiz
24%
They mature in bursa of Fabricius or bursal equivalent
0%
They are found in the red pulp of the spleen
0%
They are progenitors of plasma cells
76%
They are involved in cell mediated and humoral immunity
The correct sequence of events in activation of T cells is:
Anonymous Quiz
24%
Activation, differentiation, proliferation
0%
Differentiation, proliferation, activation
24%
Maturation, Differentiation, activation
52%
Activation, proliferation, differentiation
A lymphocyte which has undergone activation, proliferation and differentiation:
Anonymous Quiz
0%
is now called a naive lymphocyte
0%
Can deal with many dangerous pathogens
5%
Stays in the lymph node to deal with pathogans that enter it
95%
is now an effector cell
Comparing BCR and TCR, which statement is TRUE?
Anonymous Quiz
5%
The B and T cell receptors become released into the surroundings
11%
bIn contrast to BCR, TCR has 2 antigens binding sites
84%
Both are cell surface molecules
0%
They bind to antigens non-specifically
Which statement about clonal selection theory is Correct:
Anonymous Quiz
0%
Every naive lymphocyte has many types of receptors
6%
A clone of cells can recognize different antigens
89%
Only lymphocytes which meet antigens they recognize are activated
6%
The B cell receptor cannot recognize an antigen directly
The following are harmful immune responses EXCEPT:
Anonymous Quiz
26%
Allergy
0%
Autoimmune diseases
11%
Graft rejection
32%
Immunodeficiency
32%
None of the above
Where do lymphocytes undergo activation:
Anonymous Quiz
5%
Bone marrow
0%
Liver
89%
Lymph nodes
5%
Thymus gland
Which feature is characteristic of innate immunity
Anonymous Quiz
88%
It does not increase with repeated exposures.
6%
it is highly specific against a particular pathogen.
0%
It responds to bacteria and fungi, but not viruses.
6%
It takes several days to become fully functional
Concerning natural killer cells, which statement is True:
Anonymous Quiz
65%
They are capable of killing virally-infected cells
6%
They are considered part of the acquired immunity
0%
They are specific in their mechanism of killing
29%
They can phagocytose tumor cells