Immune Response

Disease-causing microorganism, such as a bacterium or virus.

• pathogen 
• allergen
• prion 
• antigen 

The part of foreign materials that cause a response from the immune system are called _____________________.

• Antigens
• Active Immunity
• Antibodies
• Antibiotics

When a macrophage engulfs a pathogen and displays the antigens, what happens next?

• Helper T cells pick up information about the specific pathogen
• B cells produce antibodies
• Killer T cells destroy more pathogens
• Nothing

Antigens are part of...

• Your own immune system.
• The pathogen.

Antibodies are made by...

• Your own cells.
• The pathogen.

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

Once bound, helper T cells release chemicals called _______________ to stimulate a defense against that specific antigen.

• cytokines

• cytoplasm

• toxins

A white blood cell that makes antibodies

• T cell

• bacteria

• B cell (plasma cell)

• mast cell

Which is true of humoral immunity?

• It involves B-lymphocytes.

• It involves antibody production.

• It involves cytotoxic T-cells.

• It kills infected host cells.

Answer explanation

From humoral immunity we get antibodies which specifically bind to antigens, neutralize them & target them for destruction.

Cell-mediated immunity is targeted against _______?

• bacteria

• extracellular viruses

• viral infected "self" cells

• B Cells

Answer explanation

Cytotoxic T-cells recognize viral antigens displayed on a host cell MHCI. Message is, "I am self, but have been infected. Kill me now."