Immune System

What is the main purpose of the immune system?

• support the body through bones and muscles
• get rid of waste from the body
• protect the body from pathogens
• move blood through the body

 Liz notices that shortly after cutting her arm accidentally the area around the cut is turning red and feeling hot.  Which immune system defense is Liz experiencing?  

• inflammation
• white blood cell clotting
• skin
• fever

Cells that ingest pathogens are

• plasma cells
• phagocytic cells
• helper T cells
• antibodies

Which of the following are examples of innate (non-specific) immunity?

• Skin forms a physical and antiseptic barrier to pathogens

• Leukocytes detect the antigens of the E.coli bacterium and produce antibodies

• Macrophages engulf bacterial cells at the site of infection

• The body produces large numbers of memory cells with specific antibodies

What is the body's first line of defence against infection?

• Physical barriers

• White blood cells

• Blood plasma

• Red blood cells

An agent that causes a disease is a...

• Pathogen

• Coronavirus

• Antigen

• Leukocyte

What are memory Cells?

• The kills infected body cells

• They help the immune system respond quicker if the same pathogen enters the body again

• They signal B Cells

• They cause Inflammation

A protein that attaches to antigens to counter their effects is called:

• Antibody

• Immune response

• Inflammatory Response

• Vector

What is a vaccine?

• A weakened pathogen injected in the body to produce immunity

• Temporary immunity that develops as natural exposure

• An overreaction of the immune system

• Medicine that helps after you're infected

Each person’s cells have a unique collection of self proteins on the surface.

• MHC

• Antigen

• Antibody

• Memory cell