A mismatch of blood types during a transfusion is dangerous because _________.
A) clotting factors in the donor's blood will cause unwanted clots known as thrombus
B) preformed antibodies in the recipient's blood will bind and clump (agglutinate) the donated cells
C) antibodies in the donor's plasma will attack and kill the recipient's healthy blood cells
D) white blood cells from the donor's blood cause inflammation

Question

Quizplus · Accepted Answer

Preformed antibodies in the recipient's blood recognize the foreign antigens on the donated blood cells as non-self and bind to them, causing the cells to clump together (agglutinate), which can lead to dangerous blockages in blood vessels.

A Mismatch of Blood Types During a Transfusion Is Dangerous