Chapter 6 - Toxic Metals & Elements (exam2)

Question 1

Define HEAVY METAL

Answer 1

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.

Question 2

Classification of Toxic Effects of Metals include (4):

Answer 2

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

Question 3

Define BIOACCUMULATION

Answer 3

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

Question 4

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

Answer 4

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

Question 5

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

Answer 5

High-level Exposure

Question 6

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

Answer 6

Lower-level Exposure

Question 7

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

Answer 7

Acute Posoining

Question 8

Symptoms of Acute Poisoning from Toxic Metals include:

Answer 8

• Gastrointestinal effects–(vomiting and stomach pain)

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

Question 9

Symptoms of Long-Term Exposure at Lower Levels include:

Answer 9

• Reduced cognitive functioning

- Mimicking of chronic disease symptoms

Question 10

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.

Answer 10

• 20

- CERCLA