McGraw-Hill Online Learning Center Test<BLURT>

McGraw-Hill Online Learning Center Test

1. Review the animation and answer the following questions.

A cytotoxic T-cell

A. recognizes foreign cells.
B. acts by producing antibiotics to destroy invaders.
C. recognizes abnormal or infected body cells.
D. stimulates B-cell division.

2. Helper T-cells A. recognize antigens present on the surface of other T-cells.
B. secrete chemicals to stimulate macrophage division.
C. destroy virus-infected cells.
D. recognize antigens presented by macrophages.

3. The specific interaction between B-cells and helper T-cells occurs because A. only those cells right next to each other will interact.
B. the interaction will involve those B-cells and helper T-cells which bind to the same antigen presenting cell.
C. the chemical signals secreted by the helper T-cell are specific for a particular B-cell.
D. B-cells must bind with helper T-cells in order to interact.

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