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CBSE Class 12-science Answered

(i)How do B-cells direct humoral immunity? (ii)Name the type of barrier of innate immunity system which involves macrophages. 
Asked by Topperlearning User | 11 Jun, 2014, 01:04: PM
answered-by-expert Expert Answer

(i) B-cell specific antigens stimulate B-cell production and it multiplies to produce a clone of plasma cells. The cells differentiated into memory and effector cells due to clonal selection. They produce antibodies that circulate in body fluid and kill the pathogens.

(ii)Cellular barrier or phagocytosis involves macrophages.

Answered by | 11 Jun, 2014, 03:04: PM

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