Understanding Vaccinations

How does the immune system recognize disease-causing bacteria as invaders?

• By their unique proteins or sugars on the surface.

• By their color.

• By their size.

• By their movement.

What is the primary function of antibodies in the immune system?

• To multiply bacteria.

• To stick to and disable or kill bacteria.

• To transport oxygen.

• To produce energy for the body.

Why are not all antibodies effective against a specific type of bacteria?

• They need to be exactly the right shape to match the bacteria.

• They are too small to fight large bacteria.

• They only work against viruses, not bacteria.

• They are only produced in small numbers.

How long can it take for the body to produce antibodies of the correct shape when first exposed to a new pathogen?

• Several minutes.

• Several hours.

• Several days.

• Several weeks.

What can happen if the immune system takes several days to produce the correct antibodies?

• The body becomes stronger.

• The bacteria multiply rapidly, causing illness.

• The bacteria leave the body.

• The body develops new organs.

What is the role of memory cells in the immune system after an infection?

• To help the body forget past infections.

• To quickly recognize and fight the same pathogen if it invades again.

• To produce different types of antibodies for new infections.

• To store nutrients for future use.

What do vaccines typically contain to stimulate an immune response?

• Live, active disease-causing bacteria.

• Fully functional viruses.

• Weakened or dead bacteria/viruses, or their surface proteins/sugars.

• Antibiotics to kill all bacteria.

How do vaccines help prevent future illness from a specific pathogen?

• They directly kill all pathogens in the body.

• They make the body immune to all diseases.

• They train the immune system to recognize and quickly eliminate the pathogen without causing actual illness.

• They replace the immune system with artificial components.