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Chapter 6 Vocabulary

Across
The body's ability to destroy pathogens before they can cause disease.
A substance that causes an allergy.
A disease that is not caused by a pathogen.
Part of the body's defense against pathogens in which cells of the immune system react to each kind of pathogen with a defense targeted specifically at that pathogen.
The virus that causes AIDS.
A white blood cell that destroys pathogens by engulfing them and breaking them down.
The process by which harmless antigens are deliberately introduced into a persons body to produce active immunity.
Part of the body's defense against pathogens, in which fluid and white blood cells leak from blood vessels into tissues and destroy pathogens by breaking them down.
A chemical that kills bacteria or slows their growth without harming body cells.
A lymphocyte that produces proteins that help destroy pathogens.
A white blood cell that distinguishes between each kind of pathogen.
A disease in which the airways in the lungs narrow significantly.
Down
A poison that can harm an organism.
A molecule that the immune system recognizes either as part of the body or as coming from outside the body.
A protein produced by a B cell of the immune system that destroys pathogens.
A substance used in vaccination that consists of pathogens that have been weakened or killed but can still trigger the body to produce chemicals that destroy the pathogens.
The ability of bacteria to withstand the effects of an antibiotic.
A disease caused by a virus that attacks the immune system.
A mass of rapidly dividing cells that can damage surrounding tissue.
Immunity in which antibodies are given to a person rather than produced within the person's own body.
A reaction caused when the immune system is overly sensitive to a foreign substance.
Immunity that occurs when a persons own immune system produces antibodies in response to the presence of a pathogen.
A living thing to small to see without a microscope.
A substance or a factor in the environment that can cause cancer.
An organism that causes disease.
A chemical that affects growth and development.
A chemical that is responsible for the symptoms of an allergy.
A lymphocyte that identifies pathogens and distinguishes one pathogen from another.