The nurse working with clients who have autoimmune diseases understands that what component of cell-mediated immunity is the problem?
a. CD4+ cells
b. Cytotoxic T cells
c. Natural killer cells
d. Suppressor T cells
ANS: D
Suppressor T cells help prevent hypersensitivity to one's own cells, which is the basis for autoimmune disease. CD4+ cells are also known as helper/inducer cells, which secrete cytokines. Natural killer cells have direct cytotoxic effects on some non-self cells without first being sensitized. Suppressor T cells have an inhibitory action on the immune system. Cytotoxic T cells are effective against self cells infected by parasites such as viruses or protozoa.
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