Nursing 6440 FINALS 2024/2025| Toxins
Exposure| Complete Questions and
Answers |PASSED| Verified 100%
What is bioaccumulation in toxicology?
The build-up of a toxin in an organism over time as it absorbs faster than it excretes.
The science of measuring the extent of harm caused by toxic substances is known as?
Risk assessment.
What is the term for a substance that causes cancer?
Carcinogen.
How do pesticides commonly affect the nervous system?
They inhibit acetylcholinesterase, leading to nerve signal disruption.
What is the primary route of exposure to lead in children?
Ingestion through contaminated objects or dust.
Which organ is primarily responsible for detoxifying chemicals in the body?
Liver.
What is the effect of chronic exposure to asbestos?
Mesothelioma, a type of lung cancer.
1
,Which toxic gas is released by burning fossil fuels and can cause respiratory issues?
Carbon monoxide.
Which heavy metal exposure is commonly associated with neurological damage?
Mercury.
What does LD50 represent in toxicology?
The lethal dose required to kill 50% of a test population.
What is the process by which pollutants move from air to water bodies?
Deposition.
How does bioavailability affect toxin exposure?
It determines the fraction of the substance that enters the circulation and is active.
Which naturally occurring radioactive gas is a leading cause of lung cancer?
Radon.
Which air pollutant is most associated with smog formation?
Ground-level ozone (O3).
How does the body eliminate water-soluble toxins?
Excretion through urine.
2
, What does the term "synergistic effect" mean in toxicology?
When combined substances create a greater toxic effect than the sum of their individual
effects.
What is the primary environmental source of arsenic poisoning?
Contaminated groundwater.
What is the primary effect of acute carbon monoxide poisoning?
Impaired oxygen delivery to tissues, causing hypoxia.
Which occupational exposure is linked to coal workers' pneumoconiosis?
Inhalation of coal dust.
What term is used to describe the long-term health effects from low-level exposure to toxic
substances?
Chronic toxicity.
How does biomagnification differ from bioaccumulation?
Biomagnification refers to the increasing concentration of toxins as you move up the food
chain.
Which type of air pollutant is most commonly released from vehicle exhaust?
3
Exposure| Complete Questions and
Answers |PASSED| Verified 100%
What is bioaccumulation in toxicology?
The build-up of a toxin in an organism over time as it absorbs faster than it excretes.
The science of measuring the extent of harm caused by toxic substances is known as?
Risk assessment.
What is the term for a substance that causes cancer?
Carcinogen.
How do pesticides commonly affect the nervous system?
They inhibit acetylcholinesterase, leading to nerve signal disruption.
What is the primary route of exposure to lead in children?
Ingestion through contaminated objects or dust.
Which organ is primarily responsible for detoxifying chemicals in the body?
Liver.
What is the effect of chronic exposure to asbestos?
Mesothelioma, a type of lung cancer.
1
,Which toxic gas is released by burning fossil fuels and can cause respiratory issues?
Carbon monoxide.
Which heavy metal exposure is commonly associated with neurological damage?
Mercury.
What does LD50 represent in toxicology?
The lethal dose required to kill 50% of a test population.
What is the process by which pollutants move from air to water bodies?
Deposition.
How does bioavailability affect toxin exposure?
It determines the fraction of the substance that enters the circulation and is active.
Which naturally occurring radioactive gas is a leading cause of lung cancer?
Radon.
Which air pollutant is most associated with smog formation?
Ground-level ozone (O3).
How does the body eliminate water-soluble toxins?
Excretion through urine.
2
, What does the term "synergistic effect" mean in toxicology?
When combined substances create a greater toxic effect than the sum of their individual
effects.
What is the primary environmental source of arsenic poisoning?
Contaminated groundwater.
What is the primary effect of acute carbon monoxide poisoning?
Impaired oxygen delivery to tissues, causing hypoxia.
Which occupational exposure is linked to coal workers' pneumoconiosis?
Inhalation of coal dust.
What term is used to describe the long-term health effects from low-level exposure to toxic
substances?
Chronic toxicity.
How does biomagnification differ from bioaccumulation?
Biomagnification refers to the increasing concentration of toxins as you move up the food
chain.
Which type of air pollutant is most commonly released from vehicle exhaust?
3
