Immune System

The immune system is made up of...

• tissues

• cells

• organs

• all of the above

Which are included in the inflammatory response? Select three options.

• pain

• swelling

• antibodies

• mucus

• redness

A leukocyte is a type of ______ blood cell.

• red

• white

• blue

What are the roles of mucus? Select two options.

• to trap pathogens

• to start fevers

• to prevent pathogens from moving into deep tissues

• to stimulate B-cells to make antibodies

• to identify antigens

Which can be used to prevent initial entry of bacteria into the body?

• inflammation

• oil

• fever

• lymphocytes

A pathogen is a microorganism that can cause disease.

What are some examples of pathogens?

• virus

• bacteria

• worms

• cats

The first line of defense involves which structure(s)?

• T-cells

• skin

• blood

• B-cells

Which of these are included in the immune system? Select 3 correct answers.

• T-cells

• lymphocytes

• B-cells

• stem cells

• oil

Which substances are contained in saliva and tears to break down pathogens?

• enzymes

• acids

• oils

• sweat

If a pathogen on food got past saliva, which additional defenses in the first line of defense would the pathogen contact?

• stomach and lymphocytes

• lymphocytes and phagocytes

• phagocytes and mucus

• mucus and stomach acid