Infection and response Flashcards
defintion of a pathogen?
A harmful/ disease causing microorganism
How to bacteria cause disease?
Once inside body cause binary fission, relase harmful toxins
how do viruses cause disease?
invade and reproduce inside living cells, multiply and invade even more cells
3 ways in which a pathogen can spread
air , e.g flu and cold through droplets in the air
water, fungal spores in plants
direct contact, e.g HIV through sexual contact
symptoms of measles
Is a viral disease that causes red rashes, fever, in serve cases blindness and brain damage
What is HIV/ aids?
HIV is a virus that attacks the immune system so it can no longer defend for itself, AIDS is caused from long term HIV
what is gonorreha?
sexually transmitted BACTERIAL diesease, results in green/yellow discharge from geneitals
Definition of malaria
A viral disease caused by protist pathogens, carried by mosquito’s as a vector and enter human blood stream
How does the skin defend against pathogens?
Physical barrier
platet’s form scab’s after a wound
relases sebum oil which deflects pathogens
How the respiratory system defend against pathogen?
Mucus that traps the pathogen and cillia cells that move the mucus up so it can be removed
How does the stomach defend against pathogens?
Hydrochloric acid will kill all pathogens
How does phagocytosis defend us against disease?
phagocytes will ingest pathogen’s and there protien coat so they cannot infect more pathogens
how does wbc’s antibodies creation defend us?
The antibodies are complementary to the anitgen, this binds pathogens together makes them easier to destroy, the second time the body gets infected it can create a much quicker and larger immune response
how does antitoxins defend us?
attaches itself to pathogens toxins and neutralizes them
what is a vaccination
contains the weakened version of the pathogen to stimulate white blood cells to make the complimentary anitbodies, so the next time it get’s infected it can create those same antibodies again
