20 REVIEW: IMMUNE SYSTEM

What is the first line of defense of the body against pathogens?

• Inflammatory response

• Immune response

• Physical and chemical barriers

• Production of antibodies

During the inflammatory response, what type of cells are primarily involved in fighting the pathogens?

• Lymphocytes

• Neurons

• Phagocytes

• Platelets

Which type of immune response involves cells that can distinguish between different kinds of pathogens?

• First line of defense

• Second line of defense

• Immune response

• Inflammatory response

What are antigens?

• Cells that produce antibodies

• Molecules on the surface of pathogens recognized by the immune system

• Types of white blood cells

• Viruses that attack the immune system

What is a major function of T-cells in the immune system?

• To produce phagocytes

• To destroy pathogens directly

• To identify pathogens by their antigens

• To cause inflammatory responses

Which disease is known to destroy T-cells, thereby weakening the immune system?

• Influenza

• AIDS

• Tuberculosis

• Hepatitis

Match the following: A) Intact skin and mucous membranes B) Immune response C) Inflammatory response and skin and mucous membranes D) Inflammatory response

• First line of defense.

• Second line of defense.

• Third line of defense.

• Innate defense system.

• Adaptive defense system.

Fever is often a beneficial immune response because it can speed the activities of leucocytes.

• True

• False

A flu vaccine is needed seasonally to be effective but a polio vaccine is only needed once. The best explanation of this is _______.

• the flu vaccine is substantially weaker than the polio vaccine

• the polio virus is substantially weaker than the flu virus

• exposure to flu vaccine produces no memory cells from proliferating B-lymphocytes

• the flu has several strains that change seasonally

Vaccines work by ________.

• stimulating the immune system

• providing nutrients

• hydrating the body

• increasing metabolism