5.4- B lymphocytes and humoral immunity 0.0 / 5 ? BiologyCell recognition and the immune systemASAQA Created by: Megan2413Created on: 07-06-17 18:07 What is humoral immunity? Immunity involving antibodies which are soluble in blood and tissue fluid 1 of 11 How does the a pathogen's antigens enter the B cell? By endocytosis 2 of 11 What does the B cell then do with the antigens? The B cell processes and presents the antigens on its own cell-surface membrane 3 of 11 How are B cells then activated? By a helper T cell's complimentary receptor binding to the processed antigen on the B cells surface 4 of 11 What is the B cell now activated to do? Divide by mitosis to produce a clone of plasma cells 5 of 11 What other cell can the activated B cells develop into? Memory cells 6 of 11 What do the clones plasma cells secrete? Antibodies specific to the pathogen 7 of 11 How do memory cells respond to future infections? By dividing rapidly and developing into plasma cells that produce antibodies to help destroy the pathogen 8 of 11 What are monoclonal antibodies? When a clone of plasma B cells secrete one type of antibody specific to one antigen 9 of 11 What is the primary immune response? The response shown by the immune system when a person is first exposed to a certain antigen (production of memory cells) 10 of 11 What is the secondary immune response? The response shown by the immune system when a particular antigen has infected once before (the use of memory cells circulating in the blood) 11 of 11
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