OVERVIEW OF THE IMMUNE SYSTEM
THE GOOD BAD AND UGLY OF THE IMMUNE SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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B-Cell
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T-Cell
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Helper T-Cell
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Antigen
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Detailed explanation-1: -Helper T cells express a protein called CD4 on their surface. This protein plays a critical role in helper T cell activation by binding class II major histocompatibility complex (MHC) molecules, which specialize in helping the immune system recognize foreign substances.
Detailed explanation-2: -T and B cells are activated when they recognize small components of antigens, called epitopes, presented by APCs, illustrated in Figure 2. Figure 2. An antigen is a macromolecule that reacts with components of the immune system. A given antigen may contain several motifs that are recognized by immune cells.
Detailed explanation-3: -Helper T cells secrete cytokines that help B cells differentiate into plasma cells. These cells also help to activate cytotoxic T cells and macrophages.