CHAPTER 13: IMMUNITY
Immunity is protection against an infectious disease. Human bodies have to know how to handle various bacterium and such that they can be exposed to. There are two types of immunity: active and passive. Active immunity is gained when an antigen enters the body, an immune response occurs and antibodies are produced by plasma cells (ex.vaccine). Passive immunity is gained when without an immune response, antibodies are injected (artificially) or passed from mother to child across the placenta or in breast milk (naturally). My answers to the questions in the test help frame the main idea of this chapter.
There are two types of phagocytes in the body: neutrophils and macrophages. Neutrophils are responsible for patrolling the body for antigens and macrophages expose as well as help destroy antigens. Neutrophils detect and antigen, an immune response is triggered in the body which alerts the immune system that steps need to be taken to combat the infectious disease. After an immune response has been triggered, one type of cells that is produced are memory cells. They survive the immune response so that they may recognize the invading antigen in the future in order to stimulate an immune response. Memory cells aid in immunity in this way because without them, the body would not know how to react to the disease and chances of survival would decrease.
There are two types of phagocytes in the body: neutrophils and macrophages. Neutrophils are responsible for patrolling the body for antigens and macrophages expose as well as help destroy antigens. Neutrophils detect and antigen, an immune response is triggered in the body which alerts the immune system that steps need to be taken to combat the infectious disease. After an immune response has been triggered, one type of cells that is produced are memory cells. They survive the immune response so that they may recognize the invading antigen in the future in order to stimulate an immune response. Memory cells aid in immunity in this way because without them, the body would not know how to react to the disease and chances of survival would decrease.