Human Defence System

Which part of the body is considered a physical barrier in the general defence system?

Clotting

What is the function of lysozyme in the general defence system?

It kills bacteria

What is the main function of phagocytes in the general defence system?

To surround and kill microorganisms

What is the role of macrophages in the general defence system?

To act as longer living phagocytes

Which body part contains bacteria that produce lactic acid to prevent the growth of pathogens?

The vagina

What is the function of nasal hairs in the general defence system?

To remove suspended micro-organisms from the air

Which cells produce antibodies in response to antigens?

Lymphocytes

What is the purpose of the complement system?

To trigger a complement reaction

What is the role of interferons in the immune system?

To prevent the spread of viruses

What causes inflammation in response to infection?

Histamine

What is the purpose of antibodies?

To prevent pathogens from entering host cells

What is artificial active immunity?

Inoculation with a non-diseasing causing part of a pathogen

Which type of immunity occurs when a child receives antibodies from the mother either before birth or through breastfeeding?

Natural Passive Immunity

Where do B-cells mature?

Bone marrow

What are the rapidly produced cells called when a B-cell comes into contact with an antigen?

Plasma cells

What is the term for B-cells that remain alive and are already present when the same antigen reappears in the organism?

Memory B-cells

What is the role of Helper T-cells in the immune system?

Recognize antigens on the surface of other white blood cells

What is the protein released by Killer T-cells that forms pores in the membranes of the cells they attack?

Perforin

What is the role of Suppressor T-cells in the immune system?

Suppress or inhibit immune response

What do Memory T-cells stimulate in the immune system?

Memory B-cells to produce antibodies