Summary

• What type of cell is a phagocyte?

  Neutrophil
• 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 is a lysosome?

  Organelles that digest cellular waste
• 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 are B lymphocytes?

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

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

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

  A long-lived B cell that remembers antigens
• What is the role of an antigen presenting cell?

  To display antigens to T cells
• What occurs when a receptor is complementary to an antigen?

  An immune response is activated
• What is a Helper T cell?

  A type of T cell that assists other immune cells
• What type of cell is a phagocyte?

  Neutrophil
• 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 is a lysosome?

  Organelles that digest cellular waste
• 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 are B lymphocytes?

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

  A differentiated B lymphocyte that secretes 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 display antigens to T cells
• What does it mean for a receptor to be complementary to an antigen?

  It can specifically bind to that antigen
• What is a Helper T cell?

  A type of T cell that assists other immune cells