C3.2 Infectious diseases

• which cell is a component of the innate immune system

  B memory cell
• lymphocytes


  are found in the lymph nodes and circulating in the blood
• antibodies


  y shaped protiens
• antibodies bind to antigens on pathogens and


  tag it for destruction by other immune cells prevent it from binding to other host cells
• antibodies


  are spevific to antigens, so we need to make different types of lymphocytes to make a lot of different types of antibodies
• antigen


  recognition molecules on the surface of a cell/virus (glycoprotein), they stimulate immune responses (recognised as non-self)
• there are two types of lymphocytes

  T-lymphocytes = responsible for recognizing correct B-cells B-lymphocytes = produce antigens via clonal selection - mitosis
• immunity 


  having either antibodies or memory cells to fight a pathogen
• HIV = Human immunodeficiency virus


  virus persist in the blood/body fluid of an infected person
• What does HIV destory

  T-helper cells
• what does the loss of T-helper cells (HIV related) do

  loss of ability to produce antibodies, increasing vulnerability to other infections