Immune System Lines of Defense

The second line of defense is ................. .

• skin

• white blood cell

• antibody

• antigen

The third line of defense is ................. .

• skin

• white blood cell

• antibody

• antigen

Phagocytosis is a process where .............. .

• the skin prevents the entry of pathogens

• the white blood cell engulf and digest the pathogens

• the immune system goes to war with pathogens

• antibodies react with antigens from the pathogens

I surround my enemy and eat them . Who am i?

• AVENGERS

• Immune system

• White blood cell

• Skin

I react with the antigens found in pathogens. Who am I?

• IRON MAN

• Immune system

• White blood cell

• Skin

The first line of defense of the immune system includes all of the following EXCEPT which one?

• Unbroken skin

• Phagocytes

• Mucus

• Sweat

• Hair

Which of the following is most likely to happen immediately after a pathogen makes it through the first line of defense?

• memory B cells are created

• the body spikes a fever to prevent the pathogen from multiplying

• B cells are activated and produce antibodies quickly

• T cells are activated to destroy infected body cells

Which one(s) of the immune system's defenses are considered SPECIFIC?

• 1st Line of Defense

• 2nd Line of Defense

• 3rd Line of Defense

• 4th Line of Defense

Which of these lines of defense of the immune system is not present at birth and needs to be built over time?

• 1st Line of Defense

• 2nd Line of Defense

• 3rd Line of Defense

Which of the following best describes why it takes so long for you to feel better after infected with a pathogen the first time?

• The pathogen takes a while to make it through the physical barriers of the 1st line of defense.

• There are not a lot of phagocytes so it takes a while for them to get rid of the pathogen.

• It takes a long while to activate B cells to produce antibodies, which ultimately allow the body to gather up the pathogens so they can be urinated out the body.

• The generation of a fever by the body prolongs the sickness.