antigen presentation
Antigen presentation is the process by which immune cells, like dendritic cells and macrophages, display pieces of foreign substances (antigens) on their surface. These antigens can come from viruses, bacteria, or other threats. When a T-cell, a type of immune cell, encounters these displayed antigens, it recognizes them as potentially harmful. This interaction triggers the T-cell to activate, leading to a coordinated immune response to fight off the infection. Essentially, antigen presentation is crucial for alerting the immune system to the presence of invaders and helping it respond effectively.
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Antigen presentation is a process where cells in the immune system display pieces of foreign substances, called antigens, on their surface. These antigens often come from pathogens like viruses or bacteria. When immune cells, such as T cells, encounter these displayed antigens, they recognize them as threats. This recognition triggers an immune response, helping the body to fight off infections. Essentially, antigen presentation acts like a warning system, alerting the immune system to the presence of invaders and enabling it to effectively target and eliminate them.