Question

What key ability of the adaptive immune response provides protection to organisms when they are exposed to antigens and pathogens a second time? How does it work?

Answer 1

Adaptive immune response is based on memory. The cells involved in adaptive immunity generally work by killing or by inactivating pathogens and antigens after they are exposed to such such antigens or pathogens. At first time exposure to pathogens or antigens ,the cells of adaptive immune response create an immune memory, Then after consequent exposure such antigens or pathogens,they create an enhanced immune response and destroy them rapidly without affecting the body of the patient much. For example,long last protecti people once suffered from measeles will develop on against it, generally it will not occur further.

Two type of cells that are mainly involved in adaptive immune response are B cells and T cells, also called lymphocytes. Bcells secrete antibodies attack antigens or pathogens and neutralize them while cytotoxic T cells induce death of such foreign bodies.