<prompt> The level of drug metabolizing enzymes in the liver determines how fast a drug is removed from the circulation. Therefore, it would be expected to find drug metabolizing enzymesHigher in smokers than in nonsmokersSimilar in smokers and nonsmokersLower in smokers than in nonsmokersSimulated by malnutri on  <response>: Smokers inhale polycyclic aromatic hydrocarbons, which stimulate drug-metabolizing enzymes. Therefore, smokers have higher levels of hepa c drug-metabolizing enzymes than nonsmokers. 