Fill in the blanks :
I. White blood cells called phagocytes move from place to place by _____ and kill microbes by first ______ them and then digesting them.
II. Each antibody has ____ antigen-binding sites. It combines with ______ foreign microbes, causing them to _____.
III. Antibodies produced by B cells are primarily active against _____ and ______.
IV. Allergies are treated with drugs like ______ in case of normal allergic reactions and _____ in case of anaphylactic shock.
V. Transplanted tissues and organs are rejected when the hosts _____ attack antigens on the ______ of the transplant. This set of antigens, unique to each genotype, is known as the ____ complex.
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