Flashcards in B1c-staying healthy Deck (28)
What disease does fungi cause?
What disease do viruses cause?
What diseases do bacteria cause?
What disease do protozoa cause?
What is a parasite and a host?
A parasite lives off another organism called a host
What is a vector?
Organisms that carry disease without getting it themselves eg mosquito
What ways can we reduce the spread of malaria?
-areas of water where mosquitos lay eggs can be drained or sprayed with insecticides
-fish introduced into water to eat mosquito larvae
What are the human body defense systems?
-skin provides a barrier
-blood clotting prevents entry of pathogens
-pathogens are trapped by mucus in airways
-hydrochloric acid in stomach kills pathogens
What are infectious diseases caused by?
Pathogens which are microorganisms
What is the difference between infectious and non infectious diseases?
Infectious diseases are caused by pathogens and can be spread.
Non infectious diseases cannot be spread and are not transmitted by a pathogen
What are some lifestyle choices that reduce your chance of getting cancer?
-eating less processed meat
-eating more fibre
What is the difference between benign and malignant tumours?
Benign grows until there is no more room, cells stay where they are
Malignant grow and spread to other sites of body
What happens to pathogens that enter the body?
-engulfed by white blood cells
-destroyed by antibodies
What do antibodies do?
Lock onto antigens leading to the death of the pathogens
What is passive immunity?
When you receive antibodies eg doctor giving injections
What is active immunity?
When the human body makes its own antibodies
What are antibiotics?
Drugs used to kill bacteria
What are antivirals?
Drugs used against viruses
Why are specific antibodies needed for antigens?
-Every pathogen has unique molecules on the surface (antigens)
-body produces antigens which will lock on to that specific pathogen
What is the process of immunisation?
1) harmless pathogen given which carries antigens
2) antigens trigger immune response by white blood cells which produce antibodies
3)immunity remains(memory cells produced)
What are the benefits of immunisation?
-stops you from getting ill
-diseases wont be spread as easily
What are the risks of immunisation?
-swelling and redness around site
-feeling under the weather
-cause other disorders
Why is careful use needed for antibiotics?
-prevent resistant strains, not being killed by certain antibiotics
What is the order new treatments are tested?
What is a double blind trial?
Both doctor and patient don't know which drug is real
What is a placebo?
Fake version of drug
Why are double blind trials used?
So doctors can treat each patient the same