IMMUNOLOGY

Detailed explanation-1: -Regulatory T cells (or Tregs) help to suppress the immune system. Lymphocytes are immune cells found in the blood and lymph tissue. T and B lymphocytes are the two main types.

Detailed explanation-2: -A type of immune cell that blocks the actions of some other types of lymphocytes, to keep the immune system from becoming over-active. Suppressor T cells are being studied in the treatment of cancer.

Detailed explanation-3: -White blood cells move through blood and tissue throughout your body, looking for foreign invaders (microbes) such as bacteria, viruses, parasites and fungi. When they find them, they launch an immune attack.

Detailed explanation-4: -Healthy cells have ‘self-antigens’ on the surface of their membranes. They let T-cells know that they are not intruders. If a cell is infected with a virus, it has pieces of virus antigens on its surface. This is a signal for the Killer T-cell that lets it know this is a cell that must be destroyed.

Detailed explanation-5: -Antibodies protect the body against infection in a number of different ways. For example, some microorganisms, such as viruses, must attach to body cells before they can cause an infection, but antibodies bound to the surface of a virus can interfere with the virus’ ability to attach to the host cell.

Detailed explanation-6: -Cytotoxic T-cells are a type of immune cell. They destroy cells infected with viruses. Another name for cytotoxic T-cells is killer T-cells. Cytotoxic T-cells are one of the three main types of cells developed in your thymus.