question: Specific antigens on the surface of red blood cells determine what, which is important in cases of transfusion?
distractor3: blood form
distractor1: blood count
distractor2: blood amount
correct_answer: blood type
support: Specific antigens on the surface of red blood cells determine blood type. The best-known blood types are ABO and Rhesus (Rh) blood types. Blood type is important in cases of blood transfusion. A patient must receive blood of his or her own blood type to avoid clumping of red blood cells.