What is the main function of the immune system?

• make red blood cells

• Defend the body against infection

• transport fluids through the body

• help the body reproduce

Which structure prevents germs from entering the body?

• white blood cells

• spleen

• lymph nodes

• skin

What do we call the fluid in which immune cells travel?

• mucous

• lymph

• white blood cells

• bile

Which of the following is not a part of the immune response?

• Making pathogens

• white blood cells attack

• create antibodies

• recognize and attack an antigen the next time it inters the body.

What is the purpose on an antibody?

• to make lymph

• to recognize an antigen

• to create white blood cells

• to transport immune cells

What is the purpose on white blood cells?

• transport immune cells

• to prevent germs from entering the body

• to fight germs

• to attack the body's own cells

What is an antigen?

• a structure that recognizes a harmful substance

• a cell in the immune system

• an infection fighter

• a harmful substance

What type of immunity develops after an infection when the body remembers the antigen?

• Adaptive

• Passive

• Innate

• Developed

What type of immunity is the body's first line of defense (skin and mucous)?

• Developed

• Innate

• Passive

• Adaptive

What type of immunity develops when you receive antibodies to a disease?

• Innate

• Developed

• Adaptive

• Passive