Question 1

About half of the people with active tuberculosis will die from destruction of their ____.

Accepted Answer

A)   lymph nodes
B)   heart
C)   brain
D)   nervous system
E)   lung tissueF) A) and B)
G) C) and D)

Question 2

Carcinogens cause ____.

Accepted Answer

A)   genetic defects
B)   birth defects
C)   cancer
D)   chronic health effects
E)   allergic reactionsF) None of the above
G) B) and D)

Question 3

A complex network of glands that release tiny amounts of hormones into the bloodstream of humans and other vertebrate animals is the ____.

Accepted Answer

A)   digestive system
B)   endocrine system
C)   excretory system
D)   circulatory system
E)   immune systemF) B) and D)
G) A) and B)

Question 4

The greatest risk from exposure to low levels of methylmercury is brain damage in fetuses and young children.

Accepted Answer

A) True 
 B)False

Question 5

Teratogens ____.

Accepted Answer

A)   are fatal to humans in low doses
B)   cause birth defects
C)   are harmful because they are irritating to skin or lungs
D)   cause infections
E)   cause allergic reactionsF) A) and E)
G) B) and E)

Question 6

The biggest viral killer is the _______________ virus.

Accepted Answer

influenza
flu

Question 7

Which of the following is a transmissible disease?

Accepted Answer

A)   heart disease
B)   cancer
C)   tuberculosis
D)   malnutrition
E)   asthmaF) B) and D)
G) A) and B)

Question 8

Which of the following is considered a cultural hazard?

Accepted Answer

A)   smoking cigarettes
B)   contagious viruses
C)   having unsafe sex
D)   earthquakes
E)   unsafe working conditionsF) B) and E)
G) A) and E)

Question 9

What are chemicals used to soften polyvinyl chloride (PVC) plastic found in a variety of products,such as detergents,cosmetics,body lotions,soft vinyl toys,and shower curtains?

Accepted Answer

A)   carcinogens
B)   phthalates
C)   estrogens
D)   androgens
E)   BPAsF) C) and D)
G) None of the above

Question 10

Why is it difficult to determine the level of exposure to a particular toxic chemical that will cause harm to humans?

Accepted Answer

This is difficult to determine...

Question 11

What term refers to a substance's resistance to breakdown?

Accepted Answer

A)   toxicity
B)   biomagnification
C)   persistence
D)   response
E)   doseF) C) and D)
G) All of the above C

Question 12

Of the 80,000 registered synthetic chemicals in commercial use,only ____ have been adequately tested to determine whether they are carcinogens,teratogens,or mutagens.

Accepted Answer

A)   2%
B)   4%
C)   10%
D)   12%
E)   15%F) None of the above
G) A) and D)

Question 13

A basic principle of toxicology is that any synthetic or natural chemical can be harmful if ingested in a large enough quantity.

Accepted Answer

A) True 
 B)False

Question 14

Over the course of human history,malarial protozoa probably have killed more people than all the wars ever fought.

Accepted Answer

A) True 
 B)False  True

Question 15

The probability of suffering harm from a hazard that can cause injury,disease,death,economic loss,or damage is referred to as ____.

Accepted Answer

A)   negligence
B)   exposure
C)   peril
D)   dangerous
E)   riskF) B) and E)
G) B) and C)

Question 16

What is a lethal dose and what is a median lethal dose (LD50)?

Accepted Answer

The lethal dose is the dose th...

Question 17

Since 1970,the occurrence of malaria has come roaring back in prevalence.Why?

Accepted Answer

A)   Swamplands and marshes have been drained.
B)   More vaccines exist.
C)   Fewer vaccines exist.
D)   Malaria-carrying species of mosquitos have become resistant to insecticides.
E)   The use of insecticides in most countries has declined.F) D) and E)
G) A) and D)

Question 18

The system responsible for defense against disease and harmful substances is the ____.

Accepted Answer

A)   circulatory system
B)   endocrine system
C)   immune system
D)   excretory system
E)   skeletal systemF) B) and D)
G) C) and E)

Question 19

Ecological medicine is a new interdisciplinary field devoted to ____.

Accepted Answer

A)   wildlife disease connections
B)   tracking down disease connections between animals and insects
C)   tracking down disease connections between insects
D)   tracking down disease connections between animals and humans
E)   finding ecologically based medicines for diseasesF) A) and E)
G) B) and E)

Question 20

People who smoke one to two packs of cigarettes daily have how much higher risk of getting Alzheimer's disease?

Accepted Answer

A)   76%
B)   65%
C)   52%
D)   44%
E)   31%F) A) and D)
G) A) and C)

Exam 17: Environmental Hazards and Human Health

About half of the people with active tuberculosis will die from destruction of their ____.

Correct AnswerverifiedShow Answer

Carcinogens cause ____.

Correct AnswerverifiedShow Answer

A complex network of glands that release tiny amounts of hormones into the bloodstream of humans and other vertebrate animals is the ____.

Correct AnswerverifiedShow Answer

The greatest risk from exposure to low levels of methylmercury is brain damage in fetuses and young children.

Correct AnswerverifiedShow Answer

Teratogens ____.

Correct AnswerverifiedShow Answer

The biggest viral killer is the _______________ virus.

Correct Answerverifiedinfluenza flu

Which of the following is a transmissible disease?

Correct AnswerverifiedShow Answer

Which of the following is considered a cultural hazard?

Correct AnswerverifiedShow Answer

What are chemicals used to soften polyvinyl chloride (PVC) plastic found in a variety of products,such as detergents,cosmetics,body lotions,soft vinyl toys,and shower curtains?

Correct AnswerverifiedShow Answer

Why is it difficult to determine the level of exposure to a particular toxic chemical that will cause harm to humans?

Correct AnswerverifiedThis is difficult to determine...View AnswerShow Answer

What term refers to a substance's resistance to breakdown?

Correct AnswerverifiedC

Of the 80,000 registered synthetic chemicals in commercial use,only ____ have been adequately tested to determine whether they are carcinogens,teratogens,or mutagens.

Correct AnswerverifiedShow Answer

A basic principle of toxicology is that any synthetic or natural chemical can be harmful if ingested in a large enough quantity.

Correct AnswerverifiedShow Answer

Over the course of human history,malarial protozoa probably have killed more people than all the wars ever fought.

Correct AnswerverifiedTrue

The probability of suffering harm from a hazard that can cause injury,disease,death,economic loss,or damage is referred to as ____.

Correct AnswerverifiedShow Answer

What is a lethal dose and what is a median lethal dose (LD50)?

Correct AnswerverifiedThe lethal dose is the dose th...View AnswerShow Answer

Since 1970,the occurrence of malaria has come roaring back in prevalence.Why?

Correct AnswerverifiedShow Answer

The system responsible for defense against disease and harmful substances is the ____.

Correct AnswerverifiedShow Answer

Ecological medicine is a new interdisciplinary field devoted to ____.

Correct AnswerverifiedShow Answer

People who smoke one to two packs of cigarettes daily have how much higher risk of getting Alzheimer's disease?

Correct AnswerverifiedShow Answer

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influenza flu

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This is difficult to determine...
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C

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True

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The lethal dose is the dose th...
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