Which is the most accurate definition of an exposure pathway? ...

[james]

Which is the most accurate definition of an exposure pathway?
 
  A) The total amount of a contaminant that comes in direct contact with the body
  B) Factor that determines a person's level of exposure to a contaminant
  C) Method by which people are exposed to an environmental contaminant
  D) Process to determine whether exposure to an environmental contaminant has occurred

Question 2

The nurse travels to Nigeria with a humanitarian aid organization to assess and treat members of a remote community.
 
  The children all have high levels of lead in their blood, as a result of exposure to lead dust created by gold mining. Many children are dying. The nurse has never witnessed such a phenomenon in the United States. Which are the most likely reasons for this discrepancy? (Select all that apply.)
  A) Larger mining operations than in the United States
  B) Lack of environmental regulations or of their enforcement
  C) Lack of knowledge concerning environmental dangers
  D) Weaker immune systems than in the United States
  E) Need of the miners to earn a living and fewer work options

[kjo;oj]

Answer to Question 1

Ans: C
Feedback:
An exposure pathway is the method by which people are exposed to an environmental contaminant that originates from a specific source. Exposure is a measure of the total amount of a contaminant that comes in direct contact with the body. An exposure estimate is a method of determining a person's level of exposure to a contaminant on the basis of associated factors. An exposure history is a process to help determine whether an individual has been exposed to environmental contaminants.

Answer to Question 2

Ans: B, C, E
Feedback:
This situation is caused by a combination of limited environmental protections, lack of knowledge concerning environmental dangers by local community members, and the need to earn an income. The size of the mining operations is not relevant. The strength of the children's immune system is irrelevant, as the immune system is effective against invading microorganisms, not against lead.

[james]

TY

[kjo;oj]

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