A 75-year-old male presents with chest pain on exertion. The chest pain is most likely due to hy-poxic injury secondary to:
a. malnutrition.
b. free radicals.
c. ischemia.
d. chemical toxicity.
ANS: C
The cardiac cells are deprived of oxygen, leading to ischemia, a reduction in blood supply to tis-sues. The cells are deprived of oxygen; they are not malnourished. Free radicals are electrically uncharged atoms or groups of atoms that have an unpaired electron. Chemical toxicity is not a factor in the chest pain.
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