The Immune System in Defence Against Disease

What are pathogens?

• White blood cells that engulf pathogens

• Proteins on the surface of pathogens

• Disease-causing viruses, bacteria, fungi, or protists

• Cells that produce antibodies

What is the role of phagocytes in the immune system?

• To produce antibodies

• To recognize antigens

• To produce antitoxins

• To engulf and absorb pathogens

What do lymphocytes produce to attack pathogens?

• Phagocytes

• Antibodies

• Toxins

• Antigens

What is an antigen?

• A cell that engulfs pathogens

• A natural poison produced by an organism

• A protein on the surface of a pathogen

• A type of white blood cell

How do antibodies help in fighting infections?

• By engulfing pathogens

• By causing pathogens to stick together

• By neutralizing antitoxins

• By producing toxins

What is the function of antitoxins?

• To produce antibodies

• To neutralize toxins

• To engulf pathogens

• To recognize antigens

What type of immune response do phagocytes provide?

• Antibody-specific

• Non-specific

• Specific

• Antigen-specific

What triggers the production of antibodies?

• Phagocytes

• Antigens

• Toxins

• Antitoxins

What is the primary role of the immune system?

• To produce toxins

• To destroy antibodies

• To produce antigens

• To prevent disease

What are lymphocytes specifically responsible for?

• Producing antibodies and antitoxins

• Engulfing pathogens

• Producing toxins

• Recognizing phagocytes