abeka health 9 section 6.2

quiz tmr over this :3

disease

any condition that prevents the body from functioning normally

infectious

caused by invading pathogens (bacteria, virus, fungi, etc)

noninfectious

cause by factors others than pathogens (aging, genetics, malnutrition, etc)

acute

severe but it lasts for a short time 

chronic

lasts for a long time or comes back regularly

communicable

can easily spread from person to person

noncommunicable

cannot be spread from person to person

bacteria

microscopic organisms that can cause many illnesses in the body; some can survive without oxygen (anaerobic)

virus

capsule of genetic information that can reprogram a cell to produce new viral cells

protozoa

microscopic creatures that resemble animals; more rare, but more severe diseases

fungi

yeast, mold, mushrooms, etc; more are poisonous than infections

parasitic worms

worm-like disease causing creatures

airborne

talking, singing, coughing, etc. spreads millions of germs into the air

surfaces

 touching a surface that has the pathogen on it

direct contact

physical contact with an individual who has the pathogen

vectors

animals that carry a dangerous pathogen or illness

memory cells

after you’ve become infected, your leukocytes will “remember” how to fight off a pathogen; resistance to disease is called **immunity**

immunity

resistance to disease

acquired

gained from memory cells and a previous encounter with a pathogen

inborn

temporary immunity in infants

species

certain pathogens cannot affect certain species

vaccination

introducing weak or dead pathogens into the body (**vaccine**) to allow an acquired immunity to occur

antibiotic

substances made from organisms that can stop the spread of pathogens, bacteria, etc