题目内容

C3a and C5a can promote ()

A. bacterial lysis
B. vascular permeability
C. phagocytosis of IgE-coated bacteria
D. aggregation of C4 and C2
E. Tumor

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All of the following are considered components of the innate immunity except ()

A. Macrophages
B. Neutrophiles
C. Immunoglobulins
D. Natural killer cell
E. Monocytes

B cells mature in which organ ()

A. bone marrow
B. Thymus
C. bursa Fabricii
D. lymph node
E. Spleen

Peptide binding groove in MHC I molecule can contain ()

A. 6-8 AA
B. 8-10 AA
C. 10-13 AA
D. 13-17 AA
E. 17-25 AA

The main components of endotoxin are ()

A. protein
B. lipopolysaccharide
C. nucleic acid
D. flagella
E. none of the above