Tag: antigen

November 29, 2025 / Mohammed looti

ANTIGEN

Definition and Fundamental Role in Immunity The term antigen (n.) refers to any substance that the immune system recognizes as being foreign, non-self, and potentially dangerous, thereby triggering a robust immune response aimed at neutralizing or eliminating the perceived threat. This recognition process is fundamental to host defense, enabling the body to differentiate between its […]

October 14, 2025 / Mohammed looti

ANTIBODY

Antibodies in the Context of Psychoneuroimmunology The Core Definition: Biological Mechanism and Psychological Relevance The Antibody, often referred to as an immunoglobulin (Ig), is fundamentally a Y-shaped protein molecule integral to the adaptive immune system. It is created and secreted naturally by specialized white blood cells known as B-cells, which mature into plasma cells, a […]