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Lead Toxicity
Assessment and Posttest Instructions

Course: WB 1105
CE Original Date: August 20, 2007
CE Renewal Date: August 20, 2010
CE Expiration Date: August 20, 2012
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ATSDR seeks feedback on this course so we can assess its usefulness and effectiveness. We ask you to complete the assessment questionnaire online for this purpose.

In addition, if you complete the Assessment and Posttest online, you can receive continuing education credits as follows:

Accrediting Organization Credits Offered

Accreditation Council for Continuing Medical Education (ACCME)

CME: The Centers for Disease Control and Prevention is accredited by the Accreditation Council for Continuing Medical Education (ACCME) to provide continuing medical education for physicians. The Centers for Disease Control and Prevention designates this educational activity for a maximum of 2.0 AMA PRA Category 1 Credit(s)™. Physicians should only claim credit commensurate with the extent of their participation in the activity.

American Nurses Credentialing Center (ANCC), Commission on Accreditation

CNE: The Centers for Disease Control and Prevention is accredited as a provider of Continuing Nursing Education by the American Nurses Credentialing Center's Commission on Accreditation. This activity provides 2 contact hours.

National Commission for Health Education Credentialing, Inc. (NCHEC)

CHES: The Centers for Disease Control and Prevention is a designated provider of continuing education contact hours (CECH) in health education by the National Commission for Health Education Credentialing, Inc. This program is a designated event for the Certified Health Education Specialist (CHES) to receive 2.0 Category I contact hours in health education, CDC provider number GA0082.

International Association for Continuing Education and Training (IACET)

CEU: The CDC has been approved as an Authorized Provider by the International Association for Continuing Education and Training (IACET), 1760 Old Meadow Road, Suite 500, McLean, VA 22102. The CDC is authorized by IACET to offer 0.15 IACET CEU's for this program.

Online Instructions

To complete the Assessment and Posttest, go to Training and Continuing Education Online and follow the instructions on that page.

You can immediately print your continuing education certificate from your personal transcript online. No fees are charged.


Please select the best correct answer.

  1. Lead is a
    1. soft, heavy, blue-gray metal
    2. naturally occurring substance
    3. commercially used substance
    4. All of the above.
  2. Which statement is true of organic lead?
    1. It is more commonly found in home environments today than is inorganic lead.
    2. It was the most available source of exposure through natural processes.
    3. It was a  common source of lead exposure in the U.S. when leaded gasoline was used.
    4. It cannot enter the body through dermal exposure.
  3. Of the following, the U.S. population most at risk from exposure to lead today is
    1. people who work in lead mining and smelting
    2. household contacts of workers engaged in the manufacture of lead-containing products
    3. children living in pre-1978 buildings with deteriorated paint
    4. construction workers
  4. In older urban areas, most of the lead in the environment today comes from
    1. contaminated drinking water
    2. lead-contaminated dust, soil, and deteriorated lead-based paint
    3. imported food, home remedies, and cosmetics
    4. commercial products containing lead
  5. Which of the following is not considered a potential source of lead exposure?
    1. jewelry
    2. treated lumber
    3. imported cosmetics and home remedies
    4. glazed ceramics
  6. What is the Center for Disease Control's blood lead action level for children?
    1. 5 µg/dL
    2. 10 µg/dL
    3. 25 µg/dL
    4. 40 µg/dL
  7. The most important route of exposure to lead by children is
    1. ingestion
    2. inhalation
    3. dermal contact
    4. All are equally important.
  8. Which of the following signs or symptoms is not consistent with childhood lead poisoning?
    1. recurrent headaches
    2. Attention Deficit Hyperactivity Disorder
    3. decreased hearing and speech abilities
    4. difficulty learning
  9. In caring for an adult patient with a blood lead level of 40 µ/dL, it is most important to
    1. continue to monitor with monthly capillary blood tests
    2. take steps to avoid further exposure to lead
    3. immediately start chelation therapy
    4. encourage a diet high in calcium
  10. As part of the exposure history, you should explore
    1. possible lead exposure at work or during hobbies
    2. hobbies that might involve lead
    3. use of imported home remedies and cosmetics
    4. All of the above.
  11. OSHA requires written notification and a medical examination for workers with blood lead levels of
    1. 10 µg/dL
    2. 25 µg/dL
    3. 40 µg/dL
    4. 70 µg/dL
  12. At a 24 month well-child check up, under what circumstances should you order a venous blood lead level?
    1. If the 12-month blood test showed a prior elevation over 10 ug/dL or no prior blood lead level is available.
    2. If child is living or spending significant time in pre-1978 housing.
    3. If a household member works in a job involving lead.
    4. All of the above.
  13. Why would a patient's BLL drop only gradually, even with complete removal from the source of exposure?
    1. Lead's half-life in the blood is almost one year.
    2. Everyone is exposed to high background levels of lead.
    3. Lead stored in the bones and soft tissues may be released over time.
    4. None of the above.
  14. Chronic lead exposure is not believed to contribute to which of the following conditions
    1. hypertension
    2. kidney disease
    3. diabetes
    4. low sperm count
  15. You should tell patients who are concerned about lead in their drinking water that
    1. As long as they don't have well water, their water is safe.
    2. Until they can get their water tested, boil their drinking water.
    3. Drinking water is non-acidic and will not leach lead out of old pipes, fixtures, or solder
    4. Until they can get their water tested, run cold water for one to two minutes before use.
  16. Which of the following statements about sources of lead in the environment is true?
    1. Lead dust can raise children's blood lead levels above the level of concern.
    2. Lead is heavy, so it does not travel far in the air from smelters or industries.
    3. Lead is only a problem in urban areas with pre-1978 housing.
    4. Children who eat paint chips make up the majority of those with blood lead levels above 10 µg/dL.

Relevant Content

Question Location of Relevant Content


What is lead?


What is lead? 


Who is at risk of lead exposure?


Where is lead found?


How are people exposed to lead?


What Are the U.S. Standards for lead levels?


How are patients exposed to lead


How should patients exposed to lead be evaluated?


What Are the U.S. Standards for lead levels?


How should patients exposed to lead be evaluated?


What Are the U.S. Standards for lead levels?


What is the biologic fate of lead?
What are the physiologic effects of lead


What are the physiologic effects of lead?


What instructions should be given to patients?


Where is lead found?


Where is lead found?

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