The major histocompatibility complex is a :
1. Series of complement-enhanced reactions to antigens
2. group of antigens, coded by a family of genes, on the surface of body cells 
3. form of autoimmunity 
4. the major cause of cancer 

The cell-mediated immunity inside the human body is carried out by 

1. T-lymphocytes

2. B-lymphocytes

3. thrombocytes

4. erythrocytes

The letter T in T-lymphocyte refers to

1. thyroid

2. thalamus

3. tonsil

4. thymus

The most active phagocytic white blood cells are

1. neutrophils and eosinophils

2. lymphocytes and macrophages

3. eosinophils and lymphocytes

4. neutrophils and monocytes

Memory cells are stored in

1. spleen

2. lymph nodes

3. both 1. and 2.

4. a specialised area of brain tissue