Bio07_TR__U10_CH40.QXD - Pearson Education
Name Class Date
(pages 1049-1054)
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Key Concepts
What environmental factors affect your health?
How can you maintain your health?
Section 40-4 The Environment and Your Health
Introduction (page 1049)
1. A is anything that increases the chance of disease or injury.
2. Is the following sentence true or false? Both heredity and environmental factors can
affect your health.
Air Quality (pages 1049-1050)
3. Circle the letter of each factor that is part of air quality.
a. number and concentrations of gases
b. amount of sunlight
c. nature and amount of tiny particles
4. Why can overexposure to carbon monoxide be fatal?
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5. is a highly reactive form of oxygen that is produced by vehicle
exhaust and factory emissions.
6. Allergic reactions can be triggered by
Water Quality (pages 1050-1051)
7. What has probably been the single most important factor in nearly doubling human life
expectancy over the last century or so?
7. Circle the letter of each of the following that can be a water pollutant.
a. human and animal wastes
b. carbon monoxide
c. chemicals
d. dust mites
Bioterrorism (page 1051)
9. The intentional use of biological agents to disable or kill individuals is called
10. Why could the release of smallpox virus cause serious problems?
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245
Name Class Date
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Cancer (pages 1052-1053)
11. Circle the letter of each sentence that is true about cancer.
a. It is generally a life-threatening disease.
b. It is characterized by cells multiplying uncontrollably and destroying healthy tissue.
c. It is caused by foreign cells invading the body.
d. It is easy to treat and to understand.
12. When do cancers begin?
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13. A mass of growing tissue is known as a(an) .
14. Is the following sentence true or false? All tumors are cancerous.
Match the type of tumor with its description.
Tumor Type Description
15. Benign a. Does not spread to surrounding healthy tissue or to
16. Malignant other parts of the body
b. Can invade and destroy surrounding healthy tissue
17. List three ways that cancer cells cause illness as they spread.
a.
b.
c.
18. Complete the concept map.
Gene Defects
may be
The result
of mutations
Inherited
which may
Occur
spontaneously
© Pearson Education, Inc., publishing as Pearson Prentice Hall.
246
Name Class Date
19. Chemical compounds that are known to cause cancer are called
20. Why is it important to detect cancer early?
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Maintaining Health (page 1054)
21. Give three reasons it is important to eat a healthful diet.
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22. For most people, adequate rest means getting about hours of sleep each
night.
23. can cause a variety of respiratory conditions as
well as cancers of the lung, mouth, and throat.
24. Is the following sentence true or false? Discovering a disease early does not make it
easier to treat
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Reading Skill Practice
When you read a section with difficult material, writing a summary can help you
identify and remember the main ideas and supporting details. Write a concise
paragraph summing up the material under each heading in Section 40-4. Each of
your paragraphs should be much shorter than the text under that heading in your
book. Include each of the highlighted, boldface vocabulary terms in your summary.
Do your work on a separate sheet of paper.
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