biology
what ways can diseases spread
aerosol, bodily fluids, contaminated food, contact, water, insects
what is vasoconstriction
blood vessels narrow
what is vasolidation
blood vessels widen
what test is used for glucose in urine and what colour does it turn to
benedicts reagent, blue to brick red
four types of microorganisms that cause disease
viruses, bacteria, fungi and single celled organisms
pathogens
can cause us harm
defences against disease
skin, platelets, antibodies & antitoxins
how do antibodies help
binds to antigens inactivating the pathogen causing it to be destoryed
how do antitoxins help
binds to toxins, inactivating them
what are the two white blood cells and how do they help
lymphocytes- produces antibodies to attach to the antigen
phagocyes- englufs and destorys pathogens