Which Molecules Of The Adaptive Defense System Provide Humoral Immunity By Circulating Freely In The Blood And Lymph, Wh ere They Bind To Extracellular Antigens And Inactivate Them And Mark Them For Destruction?
Which Molecules Of The Adaptive Defense System Provide Humoral Immunity By Circulating Freely In The Blood And Lymph, Where They Bind To Extracellular Antigens And Inactivate Them And Mark Them For Destruction?
Answer:
The molecules of the adaptive defense system that provide humoral immunity by circulating freely in the blood and lymph are called antibodies, also known as immunoglobulins. Antibodies are produced by B cells of the immune system in response to the presence of antigens, which can be harmful substances like bacteria, viruses, or toxins. These Y-shaped molecules are specifically designed to bind to extracellular antigens. Once antibodies bind to antigens, they can inactivate them directly by blocking their harmful effects or by marking them for destruction by other immune cells. Antibodies play a crucial role in neutralizing pathogens and foreign substances in the body, thus preventing infections and diseases.