LS.7.1.4 Immune System

What is an antigen?

• A type of white blood cell

• A protein that triggers the production of an antibody when introduced in the blood

• A substance that destroys antigens

• A type of vaccination

Which of the following best describes an antibody?

• A cell that causes disease

• A protein that triggers an immune response

• A substance produced by the body that destroys or inactivates an antigen

• A type of vaccination

What is the main function of white blood cells?

• To carry oxygen

• To destroy disease-causing microorganisms

• To produce antigens

• To provide energy

What does immunity mean?

• The process of making antibodies

• Resistance to disease

• The introduction of antigens

• The destruction of white blood cells

What is the purpose of vaccinations?

• To destroy white blood cells

• To introduce altered antigens to produce an immune response and protect against disease

• To increase the number of antigens in the body

• To cause disease

Which of the following best defines the immune response?

• The process of making vaccines

• The body's defensive reaction to invasion by bacteria, viral agents, or other foreign substances

• The destruction of antibodies

• The production of red blood cells

If a person receives a vaccination, what is most likely to happen in their body?

• Their body will immediately become sick

• Their body will produce an immune response to the altered antigens

• Their white blood cells will decrease

• Their body will stop making antibodies

How do antibodies help protect the body from disease?

• By producing more antigens

• By destroying or inactivating antigens that enter the body

• By causing disease

• By reducing immunity

Why are white blood cells important for immunity?

• They produce antigens

• They destroy disease-causing microorganisms, helping the body resist disease

• They make the body sick

• They reduce the immune response

A person who has developed immunity to a disease is less likely to:

• Produce antibodies

• Get sick from that disease again

• Have white blood cells

• Receive vaccinations