卫生学精品教学（南方医学院）exam-201312-Answers reviewed.docVIP

Multiple choices Type A 1. Which of the following may be excluded from the characteristics of hydrogen sulfide and its poisoning in humans? A. Colorless gas with “bitter almond” odor B. Blockage of O2 utilization in cytochrome oxidase-catalyzed oxidation of hydrogen and production of ATP. C. Heavy exposure may lead to rapid loss of consciousness and death. D. Anoxic brain injury may be developed subsequent to a rapid, high dose exposure. E. An important treatment is the immediate removal of the intoxicated workers from the exposure site. 2. Simple asphyxia induced by a major oxygen deprivation with O2 content in the air being less than 6% may give rise to the following symptom A. Tachycardia B. Nausea C. Prostration D. Rapid loss of consciousness E. Tachypnea 3. What kind of form of lead compound is stored in bone? Lead hydrogen phosphate B. Lead phosphate C. lead nitrite D. Lead chloride E. lead monoxide 4. Exposure of workers to water-soluble gaseous irritants at low or moderate levels may induce a group of symptoms including A. laryngospasm B. rhinorrhea C. pulmonary edema D. bronchiolitis obliterans E. pneumonia 5. Which of the following is the first choice of chelator for treating lead poisoning? A. Ca-Na2-EDTA B. DMSA C. DMPS D. D-Penicillamine E. DMPA 6. Which of the following is the primary route of human exposure to toxic gases？ A. Injection B. Gastrointestinal tracts C. Skin contact D. Ingestion E. Respiratory tracts 7. Which of the following is the key to prevent lead poisoning in the workplace? A. Control of Lead Exposure B. Personal protection C. Periodic medical examination D. Health education E. Personal hygiene 8. Which of the following is not the source for mercury? A. Thermometers B. Cosmetics C. paint D. Amalgams E. Blood pressure gauges 9. Which of the following belongs to the group of chemical asphyxiants? A. carbon dioxide B. ammonia C. Hydrogen sul