A 20-year-old college student suffers an acute asthma attack. In response to the asthma attack, lymphokines are secreted to:
A) Decrease B cell production
B) Increase cell growth
C) Decrease macrophages
D) Redirect target cells
Ans: B
Feedback: T cells assist B cells in producing antibodies. T cells secrete substances known as lymphokines that encourage cell growth, promote cell activation, direct the flow of cell activity, destroy target cells, and stimulate macrophages. Macrophages present the antigen to the T cells and initiate the immune response. They also digest antigens and assist in removing cells and other debris. The antigen-binding site of a T cell has a structure much like that of an immunoglobulin. It recognizes epitopes through complementary interactions. Unlike a specific antibody, a T cell dose not bind free antigens.
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