Which is correct about peripheral immune organ ()
A. It is also called secondary immune organ
B. It is the place where NK cell located
C. It is the place where RBC located
D. It is the place where immune response located
E. It includes spleen. liver and mucosal immune system
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
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
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