immune response

• immune response -> lymphocyte divides by mitosis to produce plasma cells -> antibodies (+ memory cells) -> antibodies join onto antigens of pathogen (are specific to antigen) -> antibodies bind to antigens -> inactivates + destroys
• what triggers an immune response?

  antigens on the surface of pathogens
• when will a lymphocyte divide?

  if it detects antigens
• how will a lymphocyte divide?

  by mitosis
• what will a lymphocyte produce when it divides?

  plasma cells
• what do plasma cells produce?

  antibodies -> then join onto antigens of pathogen
• memory cells respond immediately and divide rapidly to produce lots of plasma cells -> make larger amount of antibodies + quicker
• what provides immunity after natural infection or vaccination?

  memory cells
• primary response is slower + less antibodies produced
• secondary response is immediate + lots more antibodies produced
• virus mutates -> body relies on primary response -> may get a cold
• memory cells also produced when lymphocyte divides
• is same pathogen infects body, memory cells respond immediatley and divide rapidly -> produce lots of plasma cells + quicker -> immunity after natural infection/vaccination