Body Defenses

What forms a physical and chemical barrier against pathogens?

• white blood cells

• inflammation

• skin

• macrophages

What are phagocytes?

• A type of lymphocyte

• Cells that produce antibodies

• White blood cells involved in the inflammatory response

• Pathogens that the body defends against

Which of the following is a major function of T-cells?

• To destroy T-cells

• To identify pathogens by their antigens

• To cause the body to lose its ability to fight other diseases

• To act as a barrier to pathogens

What is AIDS?

• A type of white blood cell

• A response to pathogens

• A disease caused by a virus that attacks the immune system

• A molecule on the surface of pathogens

What is the role of B-cells in the immune system?

• To produce mucus and cilia

• To engulf and destroy pathogens

• To produce antibodies

• To cause inflammatory response

What is found lining your breathing passages to trap and remove most pathogens?

• mucus

• saliva

• cilia

• keratin

What happens to most pathogens that you swallow?

• they get destroyed by stomach acid

• you sneeze them out

• you cough them out

• they intercalate with your DNA

Match the following structures/functions to the appropriate level of defense

• physical/chemical barriers

• third line of defense

• general, inflammatory response

• first line of defense

• specific, targeted immune response

• second line of defense

Which of the following is not a symptom you experience during the inflammatory response? 

• redness

• swelling

• heat

• fever

• loss of sensation

Select ALL that are true about HIV.

• HIV may spread from an infected woman to her baby through breastmilk

• HIV is not spread by sexual contact

• HIV is spread by shaking hands

• HIV is not spread by using a toilet seat after it has been used by someone with HIV

• HIV is spread by sharing needles