1) " Any disease causing micro organism" - what is this the definition of? a) Microbe b) Pathogen c) Virus 2) How does our skin help prevent infection? a) Prevents bacteria from replicating b) Makes our body a hostile environment c) Acts as a barrier to prevent pathogens entering 3) What is the system which helps fight off infections? a) Respiratory b) Reproductive c) Digestive d) Immune 4) What is the first way our body tries to kill any pathogens? a) Releases antibodies b) Releases phagocytes c) Releases antigens 5) What do phagocytes do to pathogens? a) Engulf and digest b) Engulf and release c) Engulf and release chemicals 6) What are the green things on the surface of the pathogen? a) Antigen b) Antibodies c) Antibiotics 7) What is the role of antigens? a) To release antibodies to kill pathogens b) To release chemical signals c) To act as markers for WBC to attach to 8) What attaches to antigens? a) Antibiotics b) Antiblends c) Antibodies 9) What is lag time? a) The time when you start to feel ill b) The time between infection and showing symptoms c) The time after infection when you recover 10) Why do you produce antibodies v. quickly if you are re infected with the same pathogen? a) Memory cells produce antibodies rapidly b) Memory cells are in the blood c) White blood cells remember the pathogen 11) Why do vaccinations not make you feel ill? a) You are injected with a dead version of the pathogen b) You are not infected with pathogens c) You are infected with active pathogens 12) What remains in the blood after a vaccination a) Memory cells which produce the right antibody b) Memory cells which produces antibodies c) White blood cells 13) What is it called when most of a population has been vaccinated? a) Majority immunity b) Herd immunity c) Population immunity 14) Vaccinations are safe for everyone a) True b) False 15) Vaccinations are not safe for everyone because everyone has unique DNA a) True b) False 16) Antibiotics kill all pathogens a) True b) False 17) What causes variation within a bacteria population a) Binary fission b) Mutations c) DNA replication 18) These changes mean some bacteria will be what? a) Bigger b) Smaller c) Resistant 19) What is it called when pathogens can't be killed off by antibiotics? a) Antibiotic resistance b) Antibody resistance c) Antibiotic immunity 20) What was the first discovered antibiotic? a) Vancomycin b) Amoxycillin c) Penicillin 21) What is produced from glands under the skin which makes our skin waterproof? a) Water b) Oil c) Alkali

B2 - OCR 21C Science quiz

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