A 63-year-old woman has begun a diet that purports to minimize the quantity and effects of free radicals in her body. What physiological processes could best underlie her care provider's teaching about her new diet?
A)
Free radicals act as direct mediators in the inflammatory process.
B)
Free radicals inhibit the inflammatory response, limiting preadaptive response to infection.
C)
Free radicals increase cytokine expression and adhesion molecule levels, resulting in increased inflammation.
D)
Free radicals contribute to atherosclerosis and decreased immune response.
Ans:
C
Feedback:
Free radicals are thought to bring about an inappropriate inflammatory response by increasing cytokines and numbers of adhesion molecule. They are not direct mediators of inflammation and are not associated with decreased immune response but rather inappropriate inflammation. Free radicals are not associated with inhibition of the inflammatory response.
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