Immune System Quiz

Which of the following are living, cellular pathogens?

• Bacteria

• Viruses

• None of these

• Both bacteria and viruses

What is a pathogen?

• An organism or virus that causes infectious disease

• An organism or virus that causes good health

• A protein made by the body to fight off infections

• A type of white blood cell that fights off infections

What is an antigen?

• A foreign molecule that causes an immune response by white blood cells

• A protein that the body produces to fight pathogens

• A type of white blood cell that fights pathogens

• all of these

What is an antibody?

• A protein made by the body that helps to fight against a specific pathogen

• A type of virus or bacterium that invades and attacks the body

• A type of white blood cell

• A type or red blood cell

The skin, mucous membranes, and stomach acid help prevent entry of pathogens. Fever and inflammation also help to prevent infections in general. These defenses are not specific to a particular pathogen and are called...

• Nonspecific defenses

• Specific defenses

• white blood cells

• antigens

Examine the graph, showing the bodies response to 2 exposures to a particular antigen. What does the graph show?

• Antibody concentration increases more after the secondary exposure than after the initial exposure.

• Antibody concentration only increases after the initial exposure but not afterwards.

• Antibody concentration always decreases over time.

• Antibody concentration increases more after the initial exposure than after the secondary exposure.

Examine the graph. Imagine the initial exposure to the antigen was due to a vaccination. How do vaccines work?

• By exposing the body to the antigen, the body is able to rapidly produce antibodies if exposed to the antigen in the future.

• The body is injected with antibodies during the vaccination, so the white blood cells do not have to work as hard to fight the infection.

• There is no evidence that vaccines work.

• The vaccination directly kills pathogens that have already infected the body.

A patient with coronavirus arrives at a doctor's office requesting antibiotics. Should the doctor give antibiotics to the patient? Why or why not?

• The doctor should NOT give antibiotics to the patient because antibiotics only kill bacteria, not viruses.

• The doctor should NOT give antibiotics to the patient because antibiotics only kill viruses, not bacteria.

• The doctor should give antibiotics to the patient because antibiotics kill bacteria.

• The doctor should give antibiotics to the patient because antibiotics kill bacteria and viruses.

Which of the following help the body to defend against infectious diseases? Choose ALL that apply!

• White Blood Cells

• Skin and mucous membranes

• Red Blood Cells

• Pathogens

If your body is exposed to a pathogen, which of the following would be likely to occur in your body? Choose all that apply.

• An increase in white blood cells

• An increase in antibody production

• Inflammation and/or fever

• Improved digestion