McGraw-Hill Online Learning Center Test<BLURT>

McGraw-Hill Online Learning Center Test

1. Review the animation and answer the following questions.

Antibodies are produced by

A. T-cells.
B. macrophages.
C. plasma cells.
D. phagocytic cells.

2. All of the following are true of antibodies on the surface of B cells EXCEPT A. they will only bind to specific antigens.
B. they will bind to any antigen.
C. they are involved in clonal selection.
D. binding of these antibodies to antigens will stimulate the production of more B cells and plasma cells.

3. In clonal selection, A. only those B-cells with antibodies which bind to the particular antigen will be selected to divide.
B. only those T-cells that bind to the particular antigen will be selected to divide.
C. all B-cells will be stimulated to divide.
D. the B-cells which are closest to the antigen will be selected to divide.

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