Immune System

Which of the following are considered internal defenses? (there may be more than one correct answer)

• Mucus

• Inflammation

• Tears

• Hair

• Tcells

What is the function of antibodies within the immune system?

• Antibodies kill off any antigen that enters the body.

• Antibodies are only made when you are given a vaccination for specific antigens.

• Antibodies bind to specific antigens to flag for destruction.

• Antibodies are part of an external defense mechanism.

All of the following are examples of white blood cells EXCEPT

• Killer T cells

• Supporter T cells

• Macrophage

• Vaccine

• B Cell

What happens after the second time you are exposed to a pathogen?

• The body will not be able to fight off the pathogen quickly, because it knows how to get into the body easier.

• The body's immune system will react the same was as it did during the first exposure.

• The body can only be exposed to a pathogen a second time if you do not have a vaccine.

• The body will know how to fight off the pathogen quickly, because memory cells have been created after the first encounter.

Some examples of external defenses are...

• Skin

• Mucus

• Inflammation

• Saliva

• Sweat

How do T cells differ from B cells?

• T cells fight pathogens by killing pathogens directly, while B cells fight pathogens by making antibodies.

• T cells only make memory cells, and B cells only make antigens

• T cells fight pathogens by making antibodies, while B cells fight pathogens by killing pathogens directly.

• T cells can only fight off pathogens the body has encountered once, and B cells can fight off any pathogen the body comes across.

Cells that ingest pathogens are

• plasma cells
• phagocytic cells
• helper T cells
• antibodies

T cells are made in the___________

• bone marrow

• spleen

• thymus

• tonsiles

B cells mature in the

• thymus
• intestine
• bone marrow
• heart

The picture below illustrates one internal part of the body’s immune system. What process is illustrated in the picture?  

• a skin cell destroying germs.
• inflammation near an opened wound
• a white blood cell destroying pathogens
• mucus in the lungs destroying pathogens