summary 2

• What type of cell is a neutrophil?

  Phagocyte
• What is the primary function of phagocytes?

  Engulfing pathogens
• What are pathogens?

  Microorganisms that cause disease
• What are antigens?

  Substances that trigger an immune response
• What does 'G' refer to in the context of the study material?

  It is unclear without additional context
• What is a lysosome?

  Organelles that contain digestive enzymes
• What is a phagolysosome?

  Fusion of a phagosome and lysosome
• What happens when receptors are not complementary to an antigen?

  No immune response is triggered
• What is the role of receptors that are complementary to an antigen?

  They trigger an immune response
• What are B lymphocytes?

  White blood cells that produce antibodies
• What is a B plasma cell?

  A differentiated B lymphocyte that produces antibodies
• What are antibodies?

  Proteins that identify and neutralize pathogens
• What is a B memory cell?

  A B cell that remembers past infections
• What is the role of an antigen presenting cell?

  To present antigens to T cells
• What is the significance of a receptor complementary to an antigen?

  It allows for specific immune response activation