A)They are phagocytic. B)They are polymorphonuclear. C)They are made in lymphoid tissue. D)They do not produce antibodies. E)They are the most abundant white blood cell.
In a young individual who has never been exposed to a blood transfusion,why does A-type blood have anti-B antibody,while B-type blood has anti-A antibody?
A)The fetus is exposed to the mother's blood antigens during pregnancy. B)All individuals already have all possible antibodies at birth so this is normal. C)That antibodies develop to A and B epitopes on intestinal microorganisms in the intestine. D)The antibodies are transferred in the saliva from parent to child. E)The antibodies are made to the recessive blood type that is not expressed.