Immune System

____ is a foreign substance capable of stimulating an immune response in the formation of antibodies.

• immunity

• antibodies

• antigen

• lysins

____ deals with pathogens that have bypassed the first line of defense.

• first line of defense

• second line of defense

• third line of defense

• fourth line of defense

The first formed milk in mother's breast is very rich in antibodies and it is called ____

Basophils are abundant white blood cells that circulate in the bloodstream and arrive at the sites of injury or infection.

• TRUE

• FALSE

What do you call a protein released by animal cells, usually in response to the entry of a virus?

• chemokines

• eosinophils

• phagocytes

• interferon

_____ is the ability of an organism to resist infection.

Passive immunity gives shorter immunity to people. It can only last for a short period of about one month.

• TRUE

• FALSE

_____ directly kill or destroy cancer cells, antigen infected cells and tumors.

• helper T cells

• B cells

• Cytotoxic T cells

• macrophages

What do you call a type of white blood cells that is part of the immune system which destroy bacteria and viruses before they get inside the body cells.

• lymphocytes

• monocytes

• antitoxin

• natural active immunity

______ are used to treat individuals exposed to rabies, tetanus, and hepatitis.