The Immune System

What is a pathogen?

• Something that there is no cure for.

• A pathogen only includes bacteria.

• An organism that may benefit the body.

• An organism that causes disease.

What is an antibody?

• A pathogen that invades the body.

• A protein that binds to an antigen.

• A molecule produced by skin cells.

• Another name for an antigen.

Antigens are foreign substances that cause the body to carry out an immune response. Which of the following bind to antigens?

• Antibodies

• Pathogens

• B cells

• T cells

This type of cell destroys foreign cells by eating them.

• Antibody

• B cell

• Macrophage

• Antigen

All of the following are examples of innate / nonspecific immunity, EXCEPT:

• skin

• mucus membranes in the nose

• B cells

• saliva and tears

True or false? Each antibody binds to a specific antigen.

• True

• False

The purpose of your immune system is to:

• Help germs invade your body.

• Fight off sickness.

• Make your nose run.

• Give you diarrhea.

The immune system is made of

• tissues

• organs

• cells

• all of the above

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How do killer-T cells destroy infected cells?

• By eating them.

• By destroying them with chemicals.

• By producing antibodies.

• By using antigens.

In the image, antibodies will bind to the spike proteins on the surface of the coronavirus. What type of cell makes the antibodies?

• Macrophages

• T cells

• B cells

• Red blood cells

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