PATHOLOGY

Detailed explanation-1: -Each B cell produces a single species of antibody, each with a unique antigen-binding site. When a naïve or memory B cell is activated by antigen (with the aid of a helper T cell), it proliferates and differentiates into an antibody-secreting effector cell.

Detailed explanation-2: -B-cells are a type of white blood cell that makes infection-fighting proteins called antibodies. B-cells are an important part of your immune system, your body’s defense against harmful pathogens (viruses, bacteria and parasites) that enter your body and make you sick.

Detailed explanation-3: -B cells are at the centre of the adaptive humoral immune system and are responsible for mediating the production of antigen-specific immunoglobulin (Ig) directed against invasive pathogens (typically known as antibodies).