Antibodies are
A)circulating B receptors.
B)circulating T receptors.
C)circulating self-markers.
D)circulating interferons.
E)circulating cytokines.

Question

Quizplus · Accepted Answer

Antibodies are proteins produced by B cells (B lymphocytes) in response to the presence of foreign substances (antigens) in the body. They are circulating receptors that can bind specifically to the antigen, thus marking it for destruction by other cells of the immune system. Antibodies also activate other components of the immune system to eliminate the antigen.

Antibodies Are