100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Previously searched by you
Previously searched by you
logo
EHST 2110 ECU Exam 3 Questions and Answers 100% Accurate CA$19.59   Add to cart
Quickly navigate to
Preview
  2.  
  3. EHST 2110 ECU
  4.  
  5. EHST 2110 ECU

Exam (elaborations)

EHST 2110 ECU Exam 3 Questions and Answers 100% Accurate
 8 views  0 purchase
  • Course
  • EHST 2110 ECU
  • Institution
  • EHST 2110 ECU

EHST 2110 ECU Exam 3 Questions and Answers 100% AccurateEHST 2110 ECU Exam 3 Questions and Answers 100% AccurateEHST 2110 ECU Exam 3 Questions and Answers 100% AccurateEHST 2110 ECU Exam 3 Questions and Answers 100% Accurate Toxic - ANSWER - a chemical that provokes an adverse systemic effect on l...

[Show more]

Preview 3 out of 21  pages

Document information

  • August 13, 2024
  • 21
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

Subjects

  • ehst 2110 ecu exam 3 questions and answers 100 ac
  • ehst 2110 ecu exam 3 questions and answers stuvia
  • toxic answer a chemical that provokes an adver

Written for

  • EHST 2110 ECU
  • EHST 2110 ECU

Seller

avatar-seller
NursingTutor1

Reviews received

Content preview

EHST 2110 ECU Exam 3 Questions and
Answers 100% Accurate
Toxic - ANSWER - a chemical that provokes an adverse systemic effect on living organisms


Toxicants - ANSWER - can harm organs or biochemical processes away from place on body
where exposure occurred


Poison - ANSWER - chemical that can cause illness or death at a very low dose of exposure


How much poison exposure is lethal for an adult? child? - ANSWER - 3/4 of a tablespoon for
adults, 1/8 of a tablespoon for toddlers


Toxicology - ANSWER - the study of toxic substances


Dose-time relationship - ANSWER - amount of chemical and duration of exposure


Acute toxicity - ANSWER - one time exposure can cause harm; ex: kids eating rat poison


Chronic toxicity - ANSWER - repeated low-dose exposures to chemicals; ex:lead toxicity


Routes of exposure - ANSWER - oral, dermal, respiratory


Are different species affected differently by toxins? - ANSWER - yes, rats react differently than
humans


LD - ANSWER - the amount of a chemical required to kill 50% of a population of test animals
within 14 days


How is LD expressed? - ANSWER - as the number of milligrams of a chemical per kilogram of
body weight

,Smaller LD50 numbers mean what? - ANSWER - more acutely toxic


Subchronic - ANSWER - Animals divided into three groups plus a control group. Each group has
same number, with equal number of males/females. Each group fed specified level of toxicant.
(One group fed sublethal dose, one group fed no-effect dose, one group fed intermediate dose,
one control group)


Subchronic tests - ANSWER - Tests normally run for 90 days, testing what level of exposure has
no effects, which organs are affected/damaged, and the dead animals are autopsied


Chronic testing - ANSWER - Tests usually last the average lifespan of test animals


The greater the dose of the toxicant... - ANSWER - the greater the effect


Margin of safety - ANSWER - buffer zone between the highest level of exposure assumed safe
for humans


What is the arbitrary margin in the US? - ANSWER - 100 fold


Humans are __________ more susceptible to toxic effects than lab animals - ANSWER - 10
times


Children are _________ more susceptible to toxic effects than humans - ANSWER - 10 times


Hazard Identification - ANSWER - Does a particular substance or agent have an adverse effect
on human health? (animal testing to determine)


Dose-Response assessment - ANSWER - Lowest observable effect level (LOELs) and NOAEL
(adverse effect) and NOEL


Exposure assessment - ANSWER - determining the numbers and types of people (age, sex,
health) who might be exposed to the substance, duration, magnitude, and geographic extent of
exposure

, Risk assessment - ANSWER - process of determining whether something is an actual threat to
human health, estimating how much injury or harm is likely to result from a given level of
exposure and determining if those consequences are serious enough to warrant action


NOELs - ANSWER - No Observed Effect Levels. relationship between levels of exposure and
observed human health effects


US EPA and OSHA - ANSWER - established in 1970s, began writing rules and regulating
environmental health and safety issues


What are some things that the EPA and OSHA control? - ANSWER - drinking water, food
additives, pesticide residue, air pollution


What does a health risk assessment include? - ANSWER - 1. Hazard Identification
2. Dose-response assessment
3. Exposure assessment
4. Risk Characterization


Risk Characterization - ANSWER - combining information from 1-3 and production of a
comprehensive picture of types of adverse health effects likely to occur (frequency, duration)


Acceptable daily intakes - ANSWER - allowable amounts that typically do not cause adverse
effects


Polychlorinated Biphenyls (PCBs) - ANSWER - Synthetic organic chemicals used in industrial
settings, found in animal tissues throughout the world.
Most widespread chemical contaminant
Range from oily substances to waxy solids, very stable, high boiling point, high solubility in
water, low electrical conductivity and high resistance to heat


What are PCBs used for? - ANSWER - used as cooling liquids in transformers, capacitors, also
in hydraulic fluids, insulating tape, adhesives, paints, sealants, and road coverings
Great for these uses but can contaminate the environment

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller NursingTutor1. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for CA$19.59. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

79223 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
CA$19.59
  • (0)
  Add to cart