Chapter 6 - Toxic Metals & Elements (exam2) Flashcards Preview

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Flashcards in Chapter 6 - Toxic Metals & Elements (exam2) Deck (10)
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1
Q

Define HEAVY METAL

A

A heavy metal has a high atomic weight with a specific gravity that exceeds the specific gravity of water by 5 or more times at 4 degrees Celsius.

2
Q

Classification of Toxic Effects of Metals include (4):

A

(1) Major toxic metals w/ multiple effects
(2) Essential metals w/ potential for toxicity
(3) Metals related to medical therapy
(4) Minor toxic metals

3
Q

Define BIOACCUMULATION

A
  • Toxic substances such as heavy metals become more concentrated and potentially more harmful as they move up the food chain.
4
Q

What are the Modes of Exposure to Toxic Metals (3)?

A

(1) Lungs–via inhalation of dusts, metal fumes, and vapors)
(2) Skin–through contact with dusts
(3) Mouth–by ingestion

5
Q

_____-_______ _________ makes contact with high concentrations of toxic metals is most likely to occur in an occupational setting (ex. Among persons who work w/ metals)

A

High-level Exposure

6
Q

___-______ ______ may result from contact with the ambient environment (ex. Children may ingest toxic metals present in paint)

A

Lower-level Exposure

7
Q

The symptoms of ____ _____ from exposure to metals generally have rapid onset–from a few minutes to approximately one hour.

A

Acute Posoining

8
Q

Symptoms of Acute Poisoning from Toxic Metals include:

A
  • Gastrointestinal effects–(vomiting and stomach pain)

- Neurological effects–(headaches, suppression of normal breathing, and convulsions)

9
Q

Symptoms of Long-Term Exposure at Lower Levels include:

A
  • Reduced cognitive functioning

- Mimicking of chronic disease symptoms

10
Q

The Agency for Toxic Substances and Disease Registry (ATSDR) has identified a list of the top _____ hazardous substances, known as the ________ Priority List of Hazardous Substances.

A
  • 20

- CERCLA