Question

Name the major cells of the immune system. Give a detailed account of their response to a antigen attack in humans.

Answer 1

• The cells of the immune system can be categorized as lymphocytes (T-cells, B-cells and NK cells), neutrophils, and monocytes/macrophages.
• These are all types of white blood cells. The immune system protects the body from possibly harmful substances by recognizing and responding to antigens.
• Lymphocytes are divided mainly into B and T cells. B lymphocytes produce antibodies - proteins (gamma globulins) that recognize foreign substances (antigen) and attach themselves to them.
• When a B cell comes across its triggering antigen it gives rise to many large cells known as plasma cells. Thereby inhibiting antigen.