Order Expert Toxicology Exam Answers

Toxicology

 

Unless otherwise noted, multiple choice questions may have more than one correct answer.  Indicate all that apply. 

 

 

4 pts
  • Which of the following are you the least worried about in terms of toxicity? (one answer only). Give your reasoning.
  1. Carbon tetrachloride b) methyl alcohol        c) butane         d) benzene

 

4 pts
  • Of the following solvents, which would cause you the most concern in terms of its toxicity? (one answer only). Give your reasoning.
  1. pyridine b) toluene        c) acetone        d) octanol
5 pts
  • Exposure to Lewisite would cause which of the following symptoms?
  1. Vomiting
  2. Pulmonary edema
  3. High blood pressure
  4. Eye irritation
  5. Diarrhea

 

7 pts
  • 30 ppm of GB would represent how many mg/m3 at 95 oF and 750 torr? Is that enough to kill you?
10 pts

 

 

  1. Describe initial decontamination and treatment procedures if you have been exposed to each of the following:
  2. HQ
  3. VX

 

6 pts
  • Which of the following acts by inhibiting acetylcholinesterase?
  1. Dioxin
  2. Sarin
  3. Lewisite
  4. CX
  5. Pb
  6. Tabun
4 pts

 

 

  1. MCLGs can be set at 0, but not MCLs. Why?

 

4 pts
  • Which of the following statements is true?
  1. Sarin is more of an inhalation threat than Tabun.
  2. Exposure to sulfur mustard gases on the skin causes immediate blisters to form.
  3. Tabun differs from Sarin by having a phosphorus-cyanide bond instead of a phosphorus-fluorine bond.
  4. Epoxides are genotoxic agents.

 

5 pts
  • If you are exposed to 500 ppm of acetone and 150 ppm of methyl ethyl ketone over an 8 hour period, can your employer be cited for a PEL violation? Explain your answer.

 

5 pts
  • Which of the following are enforceable?
  1. Secondary MCLs
  2. MCLGs
  3. Permissible Exposure Limits
  4. Soil Remediation Levels
  5. TLVs

 

3 pts
  • Compare the toxicity of the following compounds: perfluorooctanyl sulfonate (PFOS), Toluene, Benzene, Benzo(a)pyrene. Which of the following statements is true?
  1. The cancer risk from all three is the same.
  2. The MCL for benzene is the lowest.
  3. The MCLG for all compounds is 0.
4 pts

 

 

  1. Complete the following:
    1. The Permissible Exposure Limit for hexavalent chromium is .
    2. The MCL for total chromium in drinking water is .
    3. The OSHA PEL limit for perchloroethylene exposure is .
    4. The MCLG for lead in drinking water is .
9 pts

 

 

  1. Describe three visible signs that a victim might have been the subject of a nerve gas attack. How would these signs differ for an attack by mustard gas?  How would the symptoms differ if it was exposure to chlorine?

 

5 pts
  • Methanol’s toxicity is related to the way the body metabolizes it. Describe what happens and what the effects of exposure to methanol are?

 

7 pts
  • Which of the following statements is true?
  1. Atropine is the most effective treatment after exposure to sulfur mustards.
  2. Cyanide is only a man-made chemical and does not occur naturally.
  3. Most people who are exposed to sulfur mustards don’t die.
  4. Pralidoxime is effective after exposure to Lewisite.
  5. Perchloroethylene is eliminated from the body mainly in your exhaled breath.
  6. Styrene is considered a teratogenic chemical.
  7. If you were in an area where Sarin was released you should seek the highest point possible.
4 pts

 

 

  1. What are some problems associated with determining the dose of airborne nanomaterials in a worker’s breathing zone?

 

4 pts
  • Why is it more difficult to determine the toxic effects of nanomaterials than more conventional toxics such as benzene?

 

 

The following questions are taken from either my columns listed under Week 15 Readings or from posted student papers under Assignments.

4 pts

 

 

  1. In one of my columns posted on Blackboard, I talked about a pandemic of neurotoxicity. Summarize in your own words what this means and give some examples of toxins that fit into this category.
6 pts

 

 

  1. The lead poisoning disaster in Flint, Michigan originated when the city switched its water source from Lake Huron to the Flint River. Describe some of the chemical problems that resulted from this switch in water sources and how that resulted in high levels of lead in the drinking water.
6 pts

 

 

  1. Look up the Stockholm Convention on Persistent Organic Pollutants. In your own words, describe
  2. Why POPs are a problem
  3. What the Convention requires of the Parties
3 pts

 

 

  1. What are three methods used to kill Aflotoxins?
3 pts

 

 

  1. What is the difference between a Schedule 1, Schedule 2, and Schedule 3 chemical in the Chemical Weapons Convention?
7 pts

 

 

  1. Explain, in your own words, the series of missteps that led to the Bhopal disaster in which methyl isocyanate was released causing thousands of deaths. What happens when you are exposed to methyl isocyanate?  (no more than half a page).
4 pts
  • Which of the following statements about dioxins is true?
  1. The main origin of dioxins in the environment is from natural sources.
  2. If you are measuring the body burden of TCDD, you should focus the concentration in body fat and not blood or bone concentrations.
  3. Dioxins can be biomagnified.
  4. Your chance of exposure to dioxins if you do not live or work near an industrial source of dioxins is minimal.

 

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