Study Questions

1. A dental technician begins to display symptoms, including tremors, depression, and insomnia. Which of the following chemicals present in the workplace may be responsible for the symptoms?

(A) Solvents used in dental adhesives

(B) Fluoride used in oral rinses

(C) Mercury used in the preparation of amalgams

(D) Lidocaine used as an anesthetic

2. A patient learned recently that she is about 5 weeks pregnant, but because she has been suffering from depression, she asks her physician for a prescription for a drug to treat this problem. Her physician refuses to prescribe a drug at this time because he is concerned that the fetus is at risk for toxicity from in utero exposure to the drug. What is the most likely adverse outcome if the woman began taking the drug at this time?

(A) The fetus would die.

(B) A teratogenic response would occur in the fetus.

(C) The growth of the fetus would be retarded.

3. Exposure to air pollutants can have adverse effects on human health. Exposure to one such pollutant, carbon monoxide, can result in which of the following conditions?

(A) Irritation of the deep lungs because of damage to the epithelium

(B) An increased susceptibility to respiratory infection due to impairment in phagocyte function

(C) Exacerbation of asthmatic episodes because of bronchoconstriction

(D) Hypoxia due to displacing oxygen from hemoglobin

4. A 4-year-old boy is taken to the emergency department by his parents in the afternoon the first Saturday in June. The family is moving into a house. They found the boy almost unconscious in a corner in the garage, having difficulty breathing. He was surrounded by chemical containers left by the previous owners. The labels had deteriorated and couldn't be read. On examination you noted bron-choconstriction and profuse airway secretion, weakness of the muscles, difficulty breathing, and CNS depression. Which of the following chemicals do you suspect was involved?

(A) Compound 1080

(B) Pyrethrin

(C) Parathion (d) Diquat

5. You are a staff physician at a major chemical manufacturing company. A worker on the maintenance crew has complained of being light-headed and tired occasionally at work and that if it occurs, it clears up after he leaves for the day. He was asked to write down where he had worked on the days this occurred; these are listed below. In which of these areas is he most likely to have exposures that would cause these symptoms?

(A) Herbicide production area

(B) Insecticide packaging area

(C) Label printing area

(D) Kitchen area of the cafeteria

6. You have been told there has been a large spill at the chemical company but in the confusion you weren't told where it occurred. The exposed workers were agitated and irritable and said to be having difficulty walking in a coordinated manner. Some feel quite hot as if they are burning up, and one had a seizure. Which area do you suspect had the spill?

(A) Herbicide production area

(B) Insecticide packaging area

(C) Label printing area

(D) Kitchen area of the cafeteria

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