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Biology Chapter 15 Test
Immune System
29
Science
6th Grade
05/23/2011

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Term
Airborne pathogens
Definition
Pathogens spread when a sick person coughs or sneezes and infected droplets are expelled.
Term
Pathogen
Definition
Anything that causes a disease
Term
Vaccine
Definition
a shot that contains dead or weakened pathogens
Term
Toxin
Definition
a poison produced by some pathogens that harms the body's cells
Term
Epidemiologist
Definition
a scientist who studies the causes and the spread of diseases
Term
Protozoans
Definition
single-celled organisms that are the largest known pathogens
Term
Cilia
Definition
tiny hairlike projections in your air passages
Term
Stomach
Definition
Hydrochloric acid in this organ kills pathogens
Term
Bacteria
Definition
most infections are caused by this
Term
Barriers that keep pathogens out of the body
Definition
defense barriers like cilia, hydrochoric acid, scabs, skin, chemical in sweat, tears, ear wax.
Term
Three jobs of white blood cells in immune system
Definition
identify and respond to messages
store info about pathogens
reduce and release ? to kill pathogens
Term
What do epidemiologists study?
Definition
the spread of diseases
find the source and prevent disease
Term
What was one reason God gave the laws to the Israelites?
Definition
to promote good health habits
Term
Two classifications of diseases
Definition
Communicable - contagious
Noncommunicable - noncontagious
Term
What important discovery was made by Alexander Feming?
Definition
diseases can be caused by organisms too small to be seen
Term
Can a particular pathogen cause more than one disease?
Definition
no
Term
Immunity
Definition
special protection against a disease
Term
Is a virus a living organism?
Definition
yes
Term
Active Immunity
Definition
the body remembers the pathogen and resists it, or the body reacts to the pathogens in a vaccine and stores the information (either you have had the vaccine or had the disease - example. chicken pox)
Term
Passive Immunity
Definition
protection against disease for a limited time passed on from the mother to the newborn
Term
Allergen
Definition
anything that causes the immune system to have an allergic reaction
Term
A person receiving an organ transplant must take medicines to suppress what?
Definition
the reaction of the immune system
Term
Malaria is caused by what?
Definition
protozoans that infect a certain kind of mosquito
Term
The four most common types of pathogens
Definition
protozoans, fungi, bacteria, viruses
Term
Immune response
Definition
the body's specific defense against disease which identifies and fights pathogens
Term
Inflammatory response
Definition
a nonspecific defense - swelling, redness, heat, and pain
Term
Lymph
Definition
a transparent fluid which along with blood carries white blood cells through the body
Term
Antibodies
Definition
able to destroy all types of pathogens
made by the body to fight specific pathogens
Term
Antibiotics
Definition
-can work against bacterial infections and some types of fungi
-able to fight more than one bacterial infection
-cannot work against viruses
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