ecology test 2 quiz questions

Question 1

Which of the following is NOT a typical measurement unit used to characterize PM?
A. Microns
B. ppm
C. ug/m3
D. All of the above are relavent to PM

Answer 1

B. PPM

Question 2

The subdivision of the atmosphere int otroposphere, stratosphere, mesosphere, and thermosphere is based on the vertial variation of:
A. Air temperature
B. Oxygen concentration
C. Rain
D. Air pressure

Answer 2

A. Air temperature

Question 3

Which of the following gases is most responsible for retaining heat in the atmosphere?
A. Oxygen
B. Ozone
C. Carbon monoxide
D. Water vapor

Answer 3

D. Water vapor

Question 4

Match the following definition to the correct term: “the increase in concentration of chemicals that occur in some, usually aquatic, food chains at higher trophic levels”

Answer 4

Biomagnification

Question 5

T or F: Transport of contaminants and compounds in bodies of water is usually more complex that in the atmosphere

Answer 5

True

Question 6

Which of these is not a specific route of exposure:
1. Inhalation
2. Proximity
3. Ingestion
4. Dermal

Answer 6

2. Proximity

Question 7

Which is not an advantage of biomarkers over other exposure assessment methods?
1. Confirms actual absorption
2. Integrative over all routes of exposure
3. Accounts for bioavailibility
4. Acocunts for differences bewteen people in metabolism

Answer 7

4. Accounts for differences between people in metabolism

Question 8

Which is a primary method of controlling exposures?
1. Substitution
2. Ventilation
3. Isolation
4. Personal protective equipment
5. All of these

Answer 8

5. All of these

Question 9

Which of the following statements depicts the dose-response relationship?

Answer 9

The dose response quantitatively describes the association between exposure and effect of a toxic compound

Question 10

T or F: The most common route of toxicant exposure for adults is via the intravenous route

Answer 10

False

Question 11

Which of the following is NOT one of the ways in which a toxic chemical is classified?
A. Its chemical class
B. The source of exposure
C. Its effect on specific organ systems
D. Its effect on human health
E. Whether it is a liquid or solid at room temperature

Answer 11

E. Whether it is a liquid or solid at room temperature

Question 12

T or F: Risk is the same as hazard

Answer 12

False

Question 13

T or F: Risk characterization is the first step to conduct the risk assessment

Answer 13

False

Question 14

T or F: The unit of cancer slope factor is mg/kg-day

Answer 14

False, it is (mg/kg-day)-1

Question 15

T or F: Injection is one of the major routes for environmental agents to enter the human body

Answer 15

False

Question 16

T or F: The general acceptable risk is 10 -6

Answer 16

True