B6 -Communicable Diseases Flashcards
State how a communicable disease is different from non-communicable
Communicable diseases can transmit between organisms
Define ‘pathogen
Disease-causing micro-organism or virus
Describe 3 methods white blood clews use to project against pathogens
Phagocytes engulf, lymphocytes make antibodies and antitoxins
Define ‘antibiotics’
Chemicals which kill/inhibit the growth of bacteria
State 4 types of pathogen
Virus Bacteria Fungi Protist
State why antibodies are specific to one pathogen
They are complementary to a specific antigen
State why antibiotic courses should always be finished
To prevent antibiotic resistance
State what causes pathogens to change
Mutations
State 2 chemical defences against pathogens in a human
Hydrochloric/stomach acid, lysozyme in tears and sweat, enzymes
State what a vaccine contains
Dead/weakened form of pathogen
State why antibiotics can not target viruses
They replicate inside cells
State what makes a person immune to future infections
Memory lymphocytes make lots of antibodies quickly
State 3 reasons why medicines are tested before becoming available
Toxicity, Efficacy, Dosage
Define ‘Health’
Complete state of physical, mental and social well-being
Describe the progress of phagocytosis
Phagocyte engulfs and destroys pathogen with enzymes
