Third line if defence Quiz

Describe how the third line of defence responds to pathogens in the body.

• By producing more white blood cells

• By identifying 'non-self' cells and producing antibodies

• By increasing body temperature

• By producing toxic chemicals

What is immunity?

• The ability to digest food

• The ability to remember past events

• The ability to generate a rapid response to previously encountered pathogens

• The ability to produce energy

What do lymphocytes recognize on cell surfaces?

• Hormones

• Markers

• Nutrients

• Enzymes

What is the function of markers on pathogens?

• To produce energy

• To identify the pathogen to lymphocytes

• To transport oxygen

• To digest food

What type of cells are involved in producing antibodies?

• Red blood cells

• B lymphocytes

• Platelets

• Phagocytes

What happens to antibodies after they attach to a pathogen?

• They dissolve

• They alert phagocytes to engulf the pathogen

• They transform into red blood cells

• They produce energy

How do antibodies move around the body?

• Through the lymphatic system

• In the bloodstream

• Via nerve cells

• Through muscle tissue

Describe what occurs when the antibody and marker on the surface of the pathogen bind.

• The pathogen is absorbed by the cell

• The pathogen is destroyed or phagocytes are alerted to engulf the pathogen

• The pathogen becomes inactive

• The pathogen replicates

What is the primary function of memory cells in the immune system?

• They produce phagocytes.

• They provide long-lasting immunity.

• They digest pathogens.

• They transport oxygen.

Antibodies are made by...

• Your own cells.
• The pathogen.