Histocompatibility antigens help the immune system:
A) determine whether to mount a primary or secondary response.
B) identify haptens.
C) recognize different blood types.
D) distinguish self from nonself.

Question

Quizplus · Accepted Answer

Histocompatibility antigens, also known as major histocompatibility complex (MHC) molecules, are proteins on the surface of cells that help the immune system distinguish between self and non-self cells. This is important for immune responses to infection, as well as for preventing the immune system from attacking the body's own cells. Histocompatibility antigens are not involved in determining the type of immune response or identifying haptens, and although they are related to blood types, they play a broader role in immune recognition.

Histocompatibility Antigens Help the Immune System