What is responsible for stimulation the immune system to produce antibodies?

Antigens are responsible for stimulating the immune system to produce antibodies. Antigens are foreign substances that are recognized by the immune system as harmful. When an antigen enters the body, it is recognized by antigen-presenting cells (APCs). APCs then present the antigen to T cells, which are white blood cells that play a central role in the immune system. T cells then activate B cells, which are white blood cells that produce antibodies. Antibodies are proteins that bind to specific antigens and help the immune system to neutralize and destroy them.