Immune System Quiz

White blood cells are most closely associated with which two body systems?

• circulatory and digestive

• immune and circulatory

• digestive and excretory

• excretory and immune

Microbes that enter the body, causing disease, are known as

• pathogens

• antibodies

• enzymes

• hosts

Which statement best describes why pathogens are harmful?

• All of the cells of an organism infected by pathogens become pathogens.

• pathogens cannot be controlled once they enter the cells of an organism.

• pathogens produce antibodies that will kill the host organism.

• pathogens can interfere with normal life functions.

Scientists have discovered that pathogenic organisms and the chemicals they produce can cause foodborne illnesses. These illnesses harm the body as a result of interactions between the digestive and immune systems.

Which statement most correctly describes how these two systems interact when an individual comes down with a foodborne illness?

• Chemicals produced by pathogens enter the immune system through a cut in the skin. The circulatory system carries the chemical to the digestive system, resulting in foodborne illness.

• When specific chemicals produced by pathogens enter the digestive system in contaminated foods, the ability of the immune system to fight off foodborne illness is reduced.

• When foods contaminated with pathogens are eaten, the immune system prevents the pathogens from entering the digestive system.

• The digestive system breaks down the pathogens in the contaminated foods so that they are harmless. These harmless pathogens are then transferred to the immune system.

Which substances usually stimulate an immune response?

• antibodies

• antigens

• carbon dioxide molecules

• biological catalysts

The human body fights an infection when a pathogen is detected. As a result, the pathogen stimulates the production of

• bacteria

• antibodies

• vaccines

• antibiotics

Antibodies produced against one pathogen infecting the human body may not work against a different pathogen because antibodies are

• only produced once in the body so they can't work on any other infection

• unable to produce effective antibiotics against the infection

• made of DNA the second pathogen doesn't contain

• specific for the shape of the proteins present on a particular pathogen

Which of the following statements best explains the diagram?

• Each type of pathogen has unique antigens on its surface. Only antibodies with a matching shape can bind to them.

• Each type of pathogen has unique antibodies on its surface. Only antigens with a matching shape can bind to them.

The diagram shows six antibodies, labeled with letters A through F.

Which pathogen shown below has antigens that antibody A would bind to?

• 
• 
• 
• 

The role of antibodies in the human body is to

• stimulate pathogen reproduction to produce additional white blood cells

• increase the production of guard cells to defend against pathogens

• promote the production of antigens to stimulate an immune response

• recognize foreign antigens and mark them for destruction