B1 - Staying Healthy 0.0 / 5 ? BiologyHealthy livingGCSEOCR Created by: Amy_2811Created on: 02-10-16 16:42 What is malaria caused by? A protozoan called Plasmodium which feeds on human red blood cells 1 of 19 What are vectors? An organism that carries the disease but is not affected by in (eg mosquito) 2 of 19 What is a parasite? An organism that feeds on another living organism, causing it harm 3 of 19 What changes in lifestyle and diet can reduce some cancers? (2) not smoking/using sunscreen 4 of 19 What tumor is harmless? Beign tumor cells (divide slowly) 5 of 19 What tumor is cancerous? Maglignant tumors (uncontrolled growth) 6 of 19 What are Pathogens? ) 7 of 19 What do Pathogens do? (2) Produce the symptoms of an infectious disease by damaging the body's cells/produce toxins 8 of 19 What do antibodies do? Lock onto antigens 9 of 19 What do white blood cells produce? Antibodies 10 of 19 What is active immunity? White blood cells producing antibodies 11 of 19 What is passive immunity? Vaccinations 12 of 19 What happens during immunisation/vaccination? a harmless pathogen is injected/the antigens trigger a responce from white blood cells/memory cells remain in body 13 of 19 What does an antibiotic do? Destroy pathogen 14 of 19 What do antiviral drugs do? Slows pathogens development 15 of 19 What is a placebo? A harmless pill ( sugar pill) used in blind trials) 16 of 19 What is special about a blind trial? The patient doesn't know what they are taking (drug or placebo) 17 of 19 What is special about a double-blind trial? The patient and doctor don't know who has taken what (drug or placebo) 18 of 19 What is MRSA? Methicillin-resistant Staphylococcus aureus (antibiotic resistant bacteria) 19 of 19
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