Keratinocytes synthesize vitamin C in the presence of sunlight.
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Q71: _ enhances proliferation of new T cells
Q72: IgE helps protect against _ worms and
Q73: Lymphocytes that have not yet been exposed
Q74: Lymphoid tissues,the tonsils and tongue,provide immunological protection
Q75: Body-produced chemicals that make bacteria more susceptible
Q77: Granstein cells act as a "brake" on
Q78: Unlike B cells,which secrete antibodies that can
Q79: Shared characteristics of the immune reactions to
Q80: In neutralization,antibodies combine with _ toxins,preventing these
Q81: Figure12-2
Use the figure above (Figure12-2)to answer the
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