Naive CD4+ cell 3 Helper T cell 14 Antigen • I = What BCR / Igs does it express • 2 = All types of antigens it can detect 3= which cell would activate • 5 = • 4 = Mechanisms/receptors 5 7 до Naive B cells activation to Activated B lymphocyte 6 needed for B-cell activation. by helper T cells Changes occur in B-cells and antibodies giving rise to Area/ region T-B cell interaction occurs • 6 = Where does it 8 19 • 7, 8 = •9, 10 = 10 changes in antibodies cells generated

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Immunology

Immunology is the division of science involved with the immune reactions occurring in living organisms. The organisms are accustomed to evolving internal defense mechanisms to evade the invasion of microbial pathogens. Diverse cells are connected with stimulating the immune responses, which produce inhospitable conditions to the microbes prompting their lysis and thus inhibits the multiplication of the pathogens. The immune system can distinguish the pathogens through the aid of cellular intercommunication and launch responses to destroy them.