Question

A disease that causes the body to produce antibodies against a foreign substance is classified as

Answer 1

Immune system produces antibodies against the foreign bodies.

When the body senses foreign substances (called antigens), the immune system works to recognize the antigens and produce antibodies against those antigens.

The immune system protects the body from possibly harmful substances by recognizing and responding to antigens. Antigens are substances (usually proteins) on the surface of cells, viruses, fungi, or bacteria. Nonliving substances such as toxins, chemicals, drugs, and foreign particles (such as a splinter) can also be antigens. The immune system recognizes and destroys, or tries to destroy, substances that contain antigens.

Immune system disorders occur when the immune response is directed against body tissue, is excessive, or is lacking. Allergies involve an immune response to a substance that most people's bodies perceive as harmless.

An efficient immune response protects against many diseases and disorders. An inefficient immune response allows diseases to develop. Too much, too little, or the wrong immune response causes immune system disorders. An overactive immune response can lead to the development of autoimmune diseases, in which antibodies form against the body's own tissues.