Immunoglobulins are primarily secreted by which type of cells?

Immunoglobulins, also known as antibodies, are primarily secreted by plasma cells. These cells are a type of white blood cell that arises from B lymphocytes (B cells) after they become activated in response to an antigen. Upon activation, B cells differentiate into plasma cells, which are specialized for the production and secretion of antibodies.

Antibodies play a crucial role in the immune response by identifying and neutralizing pathogens such as bacteria and viruses. Each plasma cell can produce a large quantity of immunoglobulins specific to the antigen that triggered their formation. This capability is essential for the adaptive immune response, which provides long-term immunity.

Other cell types mentioned, such as red blood cells, macrophages, and T-cells, either do not produce immunoglobulins or have different roles in the immune response. Red blood cells are primarily involved in oxygen transport and do not have a role in antibody secretion. Macrophages are important for phagocytosis and presenting antigens to T-cells but do not produce antibodies. T-cells, while essential for cell-mediated immunity and aiding B-cells in the production of antibodies, do not secrete immunoglobulins directly. Thus, the role of plasma cells is unique