Unit 6 Flashcards

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1
Q

What list takes into account Toxic Metals?

A

CERCLA Priority List of Hazardous Substances

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2
Q

What is that toxic substances list created by?

A

ATSDR, rank-ordered list of hazardous substances, revised and published on a 2-year basis with a yearly informal review and revision

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3
Q

Why are these substances listed? What characteristics must they have? (Two)

A
  1. Have known or suspected toxicity

and

2.. Have potential for human exposure at National Priorities List sites

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4
Q

National Priorities List (NPL)

A

Most serious uncontrolled or abandoned hazardous waste sites identified for possible long-term remedial action under Superfund, updated at least once a year

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5
Q

Characteristics of heavy metals (weight, specific gravity that exceeds specific gravity of what at 4 Celsius) (two things)

A
  1. High atomic weight
  2. Water
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6
Q

Essential metals with potential for toxicity

A

Iron, copper, manganese, zinc

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7
Q

3 modes of exposure toxic metals

A
  1. Lungs (inhalation)
  2. Skin (contact with dusts)
  3. Mouth (ingestion)
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8
Q

Acute toxic metal poisoning

A

Rapid onset

Symptoms: either gastrointestinal or neurological

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9
Q

Long-term metal exposure consequences

A

Reduced cognitive function

Mimicking of chronic disease symptoms making it difficult to differentiate and diagnosis

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10
Q

Potential exposure media

A

Air, soil/dust, water, biota/food

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11
Q

Which heavy metals have the capacity to cross the placental barrier?

A

Lead and mercury

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