Immune System

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.

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.

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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.

Pathogens are...

• Foreign substances that attack the body.

• White blood cells that attack foreign substances that enter the body.

• A type of internal defense mechanism in the immune system.

• Proteins that cause disease.

These cells activate killer T cells and other helper T cells as well as activate B cells

• Helper T Cells
• Cytotoxic T Cells
• Macrophages
• Suppressor Cells

A white blood cell that makes antibodies

• T cell
• bacteria
• B cell
• mast cell

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These cells are responsible for identifying the "enemy" in an immune response.

• Killer-T Cells
• Antibodies
• Helper-T Cells
• B Cells

Example of 3rd line of defense.

• T cells and B cells reacting to pathogens
• Phagocytes engulfing pathogens
• Hydrochloric acid killing pathogens
• Mucus and cilia catching pathogens

These cells are responsible for making antibodies.

• Helper T Cells
• Killer T Cells
• B Cells
• Macrophages

These cells remain in the blood stream after an immune response.

• Memory B and T Cells
• Killer T Cells and B Cells
• Helper T  and B Cells
• Suppressor Cells and Macrophages