B5 Flashcards
define health
a state of physical and mental well-being
communicable disease
cashed by pathogens, can be spread form person to person
non-
communicable disease
not caused by pathogens, (genetic diseases, malnutrition) leading to deficiency diseases
correlation
a link between two factors that happened. not equal to cause
vaccine
harmless bacteria injected into the body, causing white blood cells to produce antibodies, creating immunity against the disease
droplet infection
transmitted through an ill person expelling droplets full of pathogens (coughing, sneezing, breathing, talking) being breathed in by people who are not ill, who pick up the infection. e.g flu, common cold, tuberculosis.
direct contact
spread by the direct contact of an infected organism with a healthy one. in plants; plant disease, where a tiny piece of infected plant material left in a field can infect an entire new crop. in people; STDs spread by direct contact of the skin. pathogens such as HIV/AIDs have to enter the blood through needle sharing/scratches
spread through water
in humans; eating raw, undercooked or contaminated food, drinking water containing sewage. the pathogens enter your body through your digestive system
antitoxins
substance made by white blood cells to counteract poisons produced by pathogens
antibiotics
medicines which kill bacteria
independent variable
the variable that is changed in an experiment
dependant variable
the variable that is measured in an experiment
control variable
the variable that is kept the same throughout an experiment
peer reviewing
vector
an agent that transmits infectious diseases
