3.1 test Flashcards
4 ways to transmit diseases direct contact examples
kissing
hand shaking
tatto parlour
sexual contact
transmit diseases 2nd hand contact what are examples of indirect contact
sneezing water and food
door knobs. -sharing infected food
airborne. - contaminated food
sharing food or drinks - E.Coli outbreaks (salads,
processed meats
Animals
zoonotic means carried by animals / rabies
pathogens
. Living things and substances that cause disease
they are found in
air , water and soil -every where around you
what does the two lines of defence do
skin: prevents pathogens from entering your bloodstream
immune system: white blood cell that activate when a pathogen is caught
what does the B cell important for?
binds to antigen and makes them harmless
what does the T cell important for?
find Antigen and tells B cell to make antibodies
find and destroy all antigens
what do viruses not do
Reproduce
react to environment
grow
create waste
needs energy
what are viruses measured in
micrometers and nanometers
what is capsid
is a outer shell made of protein and some enveloped viruses hide within that cell membrane
what is the viral shape of helical viruses
its a hollow protein cylinder capsids
what is the viral shape of polyhedral
is a many sided capsid which are triangular sided
what is the Enveloped virus
its a Helical or polyhedral viruses that have membrane around them
what is the viroid
A viroid has no protein capsid
what is the prion
is consists of protein
when a virus invades a cell it can do two things
it can quietly live inside you without doing any harm for a while
insert itself into your dna and take over
