B2 - Keeping Healthy

    Cards (8)

    • your immune system destroys what?

      Pathogens.
    • What system destroys Pathogens?
      Immune system
    • What is the most important part of the immune system?

      White blood cells - these are so important because they move around the entire body patrolling for pathogens.
    • Each cell has antigens on it's surface. Each antigen is unique to the cell type that it is found on. White blood cells have _________ in their membrane which helps them to identify antigens on pathogens.
      Receptors
    • In a healthy person White blood cells recognise antigens on pathogens as non-self (foreign) and antigens on normal body cells as self. When they come across _______ antigens the immune system is triggered to destroy any invading pathogens. 

      Non self ( or foreign)
    • What is a phagocyte ?

      A phagocyte is a non - specific white blood cell which engulfs and digests pathogens . A phagocyte detects a pathogen then the phagocyte binds to the pathogen.
    • What is phagocytosis?

      Phagocytosis is when a white blood cell engulfs non - specific cells and digests them.
    • Draw a diagram of phagocytosis ? ( when white blood cells consume foreign cells)

      .
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