What type of immunity results from vaccination?A. Innate immunity B. Naturally acquired active immunityC. Naturally acquired passive immunity D. Artificially acquired active immunityE. Artificially acquired passive immunity
D. Artificially acquired active immunityInjection is artificial and antigen exposure generates an active response.

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A human"s resistance to canine distemper is an example ofA. Innate immunity. B. Naturally acquired active immunity.C. Naturally acquired passive immunity. D. Artificially acquired active immunity.E. Artificially acquired passive immunity.
What type of immunity results from injection of tetanus antitoxin?A. Innate immunity B. Naturally acquired active immunityC. Naturally acquired passive immunity D. Artificially acquired active immunityE. Artificially acquired passive immunity
E. Artificially acquired passive immunityInjection is artificial and being given antibodies is passive.
Which of the following recognizes antigens displayed on host cells with MHC II?A. TC cell B. B cell C. TH cell D. Natural killer cell E. Basophil
The specificity of an antibody is due toA. Its valence. B. The constant portions of the H and L chains.C. The H chains. D. The variable portions of the H and L chains.E. The L chains.
D. The variable portions of the H and L chains.The variable portions of both chains make up the idiotypic portion of the antibody.
Which of the following is NOT a characteristic of B cells?A. They originate in bone marrow.B. They have antibodies on their surfaces.C. They are responsible for the memory response.D. They are responsible for antibody formation.E. They recognize antigens associated with MHC I.
The following events elicit an antibody response. What is the third step?A. Antigen-digest goes to surface of APC. B. APC phagocytizes antigen.C. TH cell recognizes antigen-digest and MHC II. D. B cell is activated.E. TH cell produces cytokines.

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C. TH cell recognizes antigen-digest and MHC II. The antigen is phagocytized, presented, and recognized by the Thelper cell.
The presence of which of the following indicates a current infection rather than a previous infection or vaccination?A. IgA B. IgG C. IgM D. IgD E. IgE
An antibody"s Fc region can be bound byA. Antibodies. B. Macrophages. C. T helper cells. D. B cells. E. CTLs
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