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16 Cards in this Set
- Front
- Back
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what is pathogen |
migrograisms that cause disease |
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how do bacteria and viruses make us feel ill? |
reproduce in the body damage cells and release toxins. |
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how do white blood ceels helps defend against pathogens? |
ingest pathogens and destory them, produce antibodies and antitoxins. |
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how does immunity develop? |
antigens - unique protiiens on apathogen cell surface , white blood cells produce antobodies to join up with antigens on a pathogen. |
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what impact did semmelweiss research have? |
he made the doctors wash their hands in the chlorine water. there was huge decrease in the nummber of deaths. |
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how are painkillers useful ? |
they relieve symptoms of an infection or illness |
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what are antibiotics are what can they used for? |
are medcine that work inside the body to kill bacteria that cause diswases by damaging the bacteria cells. |
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what is one of the impacts of the overuse of antibiotics? |
Overuse of antibioics can cause resistant bacteria to develop |
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Why is it so difficult to treat viral infections? |
Viruses live inside body cells |
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Describe the action that vaccinations have on the body |
Given a weak.dead form of the pathogen. White blood cells produce antibodies. Pathogen is destroyed. |
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what does MMR vaccine protect people against? |
MMR vaccine is used to protect against measles, mumps and rubella. |
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why mustt petri dishes be sterlisied before use? |
to kill any microrgranisms already on the dishes. |
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when using incullting loops to transfer bacteria what must be done to avoid contamination? |
the loop must be heated in a flame |
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why must perti dishes be trapped shut ? |
to stop microgranisms geeting in or out. |
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what is maximum temperatue that cultures can be incubated to in a school. |
must be incubated at 25oC max |
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why is this? |
it reduces risk of the growth of pathogens this might be harmful to humans. |
