AEP Environmental Health & Toxicology 3

Question 1

In toxicology, a 'threshold pollutant' is best defined as a chemical:

Accepted Answer

Below a certain exposure level that produces no measurable adverse effect

Answer

That is harmful at any measurable concentration

Answer

That requires metabolic activation before becoming toxic

Answer

Listed as a priority pollutant under the Clean Water Act

Question 2

Environmental justice in the context of environmental health policy refers to:

Accepted Answer

Fair treatment of all people regardless of race, income, or national origin in the development and enforcement of environmental laws

Answer

Legal enforcement penalties for companies violating environmental regulations

Answer

Balancing ecosystem protection against economic development needs

Answer

International treaties governing transboundary air and water pollution

Question 3

Which organ is primarily responsible for biotransformation (metabolic processing) of most toxic chemicals in the human body?

Accepted Answer

Liver

Answer

Kidney

Answer

Lung

Answer

Spleen

Question 4

Lead (Pb) exposure in children is a major public health concern primarily because of its effects on:

Accepted Answer

Neurological development and cognitive function

Answer

The cardiovascular system and blood pressure regulation

Answer

The immune system and susceptibility to infection

Answer

The renal system and kidney filtration capacity

Question 5

Ground-level ozone is best classified as which type of air pollutant?

Accepted Answer

Secondary pollutant formed from photochemical reactions between NOx and VOCs

Answer

Primary pollutant emitted directly from combustion sources

Answer

Criteria pollutant directly released from power plant stack emissions

Answer

Hazardous air pollutant listed under Clean Air Act Section 112

Question 6

In environmental toxicology, 'persistence' of a chemical refers to its:

Accepted Answer

Resistance to environmental degradation, allowing long-term presence in the environment

Answer

Ability to cross biological membranes and enter cells

Answer

Tendency to partition into lipid-rich tissue rather than water

Answer

Capacity to form covalent bonds with DNA

Question 7

Which federal law requires facilities to report toxic chemical releases and transfers through the Toxics Release Inventory (TRI) program?

Accepted Answer

EPCRA (Emergency Planning and Community Right-to-Know Act)

Answer

CERCLA (Superfund)

Answer

RCRA (Resource Conservation and Recovery Act)

Answer

TSCA (Toxic Substances Control Act)