1) What is the major histocompatibility complex? A. leukocyte antigen complex B.
ID: 3508591 • Letter: 1
Question
1) What is the major histocompatibility complex?
A. leukocyte antigen complex
B. set of highly polymorphic genes whose final protein products regulate the immune responses, especially antigen presentation to T cells
C. also called HLA D. also called MHC
E. all of the above
2). Select the INCORRECT combination:
A. most abundant in serum/IgG
B. produced in the largest amount/IgA
C. found in fetal serum/maternal IgG
D. bound to mast cells/IgM
3) What are the biological actions of TNF?
A.Low concentrations TNF acts on leukocytes and endothelium to induce chronic inflammation
B. Moderate concentrations mediates systemic effects of inflammation
C. High concentrations TNF causes pathologic abnormalities of septic shock
D. both b and c are correct
E. all of the above
Explanation / Answer
1). E. all of the above.
Major histocompatibility complex is a set of highly polymorphic genes whose final protein products regulate the immune responses, especially antigen presentation to T cells. It is also called HLA (Human leukocyte antigen complex) or MHC.
2). D. bound to mast cells/IgM is incorrect
Most abundant in serum is IgG - is correct.
Produced in the largest amount/IgA- Is correct
Maternal igg is found in fetal serum- is correct.
IgM is not bound to mast cells. IgE is not bound to mast cells.
3). D. both b and c are correct
Low concentrations TNF acts on leukocytes and endothelium to induce acute inflammation but not chronic inflammation.
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