Foreign cells that enter human body have unique cell surface proteins, known as ________, which stimulate body's defense to attack.

Question

Quizplus · Accepted Answer

Antigens are the unique cell surface proteins on foreign cells that stimulate the body's immune system to produce antibodies and attack the invader. Leukocytes, Rh factors, and platelets are not antigens but are components of the blood. Antibodies are produced by the body's immune system in response to the presence of antigens.

Foreign Cells That Enter Human Body Have Unique Cell Surface