Ch. 9 The Immune System

3. _____________ system filter's foreign material from the blood in order to defend the body against infection.
6. __________ cells are a type of B cell that actively secretes antibodies, which will bind to antigens.
8. Single celled organisms that have no membrane bound organelles.
9. A misfolded protein that is infectious
10. ______ proteins are self-antigens that are on human cell surfaces enabling recognition of “self”.
11. __________ T cells directly attack and destroy abnormal (tumor or viral-infected) cells and foreign cells.
12. _________ are antiviral proteins that interfere with the synthesis of viral proteins and thus inhibit viral infection to healthy cells.
13. Chemicals which causes the brain the reset your internal thermostat to a higher temperature.

1. A type of pathogen that is smaller than bacteria and contains nucleic acids surrounded by a protein coat.
2. ___________ cells are white blood cells that surround and engulf invading bacteria.
4. ____________ disorders occur when there is an inability of immune system to distinguish “self” from “non-self”.
5. The organ is known as the largest lymphatic organ.
7. _________ are usually produced from dead or weakened pathogens and are used to prevent infections.
9. The scientific term for disease-producing microorganisms