Biology-B3-The Immune System 0.0 / 5 ? BiologyMicrobes and diseaseGCSEAQA Created by: tonisha_Created on: 12-06-21 11:17 What is one purpose of the immune system? to destroy pathogens and prevent disease 1 of 27 What is another purpose of the immune system? protects us from infection from same pathogen 2 of 27 Which type of cells are involved in the immune system? white blood cells 3 of 27 What are the three main functions of white blood cells in the immune system? phagocytosis, antitoxins and antibodies 4 of 27 What is the first stage of phagocytosis? WBC will detect chemicals from pathogen and move towards it 5 of 27 What is the second stage in phagocytosis? WBC engulfs and ingests pathogen 6 of 27 What is the third stage in phagocytosis? WBC releases enzymes to destroy pathogen 7 of 27 What are antibodies? protein molecules produced by WBC 8 of 27 Which type of WBC produces antibodies? lymphocytes 9 of 27 What is the first stage in antibody production? WBC detects pathogens and releases antibodies 10 of 27 What is the second stage in antibody production? The pathogens are destroyed 11 of 27 What is one key thing about antibodies? they are extremely specific 12 of 27 What do pathogens have on their surface? foreign antigens 13 of 27 What are antigens? unique molecules 14 of 27 What do the antibodies bind to? the antigens 15 of 27 What happens once antibodies have been produced for that pathogen? they will remain in the blood for a long time 16 of 27 Why do they remain in the blood? to prevent infection in the future from the same pathogen this means antibodies can be produced very quick 17 of 27 Why do we get a cold every year if we have already had it? the cold bacteria evolves and mutates causing new variants for which the body needs to produce new antibodies for 18 of 27 What are antitoxins? chemicals that neutralise toxins released from bacteria 19 of 27 What is the first stage of antitoxin production? the pathogen will release toxins 20 of 27 What is the second stage? WBC will produce antitoxins 21 of 27 What is the third stage? antitoxins will bind and counteract with toxins 22 of 27 What is the fourth stage? toxins become neutralised 23 of 27 What are the two types of WBC? phagocytes and lymphocytes 24 of 27 What are phagocytes for? they directly attack invading pathogen 25 of 27 What are lymphocytes for? producing antibodies 26 of 27 What is a misconception with WBC (location) WBC can be found anywhere in the body, not just the blood. 27 of 27
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