What are the substances produced in the body that destroy or neutralise foreign substances called?

The substances produced in the body that destroy or neutralize foreign substances, such as bacteria and viruses, are known as antibodies. Antibodies are specific proteins generated by the immune system in response to antigens, which are the foreign substances that trigger this immune response. They function by binding to these antigens and either marking them for destruction by other immune cells or neutralizing their harmful effects, thereby facilitating their removal from the body.

In the context of the immune system, antibodies play a crucial role in protecting the body against infections and diseases. They are produced by B cells, a type of white blood cell, and each antibody is tailored to combat specific pathogens. Understanding the role of antibodies is vital for fields like immunology, medicine, and even cosmetic therapies involving the immune response.

Other options do not accurately describe the specific function of neutralizing foreign substances. Antigens are the foreign substances themselves, hormones are regulatory substances that control various bodily functions, and proteins encompass a wide range of molecules, not specifically those involved in immune responses.