1. Quick write
Notes ** What Causes Infectious Diseases?
Handout 1 Re-teaching 2 sides
How Are Infectious Diseases Treated?
Notes** How Your Body Fights Disease
Handout 2 both sides
What You Can Do to Stay Well

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3. * Please initial the attendance sheet today
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4. Section 1 What Are Infectious Diseases?
Chapter 13
List 5 ways a person might come into contact with infectious organisms.
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5. ** What Causes Infectious Diseases?
Section 1 What Are Infectious Diseases?
Chapter 13
** What Causes Infectious Diseases?
Infectious diseases are diseases caused by agents invading the body.
Bacteria are single-celled organisms, some of which cause disease. Other kinds of bacteria are harmless or even helpful to the body. Tetanus, tuberculosis, and sinus infections are bacterial diseases.
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6. ** What Causes Infectious Diseases?
Section 1 What Are Infectious Diseases?
Chapter 13
** What Causes Infectious Diseases?
Viruses are tiny disease-causing particles made up of genetic material and a protein coat. Viruses survive and replicate inside living cells. Colds, the flu, measles, chicken pox, and AIDS are viral diseases.
Fungi are organisms that absorb and use the nutrients of living or dead organisms. Some fungi cause diseases, such as athlete’s foot and ringworm.
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7. ** What Causes Infectious Diseases?
Section 1 What Are Infectious Diseases?
Chapter 13
** What Causes Infectious Diseases?
Protozoans are single-celled organisms that are larger and more complex than bacteria. They account for some of the leading causes of death worldwide, including malaria.
Parasites get their energy and nutrients by feeding on other living things. Head lice, tapeworms, and some roundworms are parasites.
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9. Handout 1 Reteaching
SECTION: WHAT ARE INFECTIOUS DISEASES?
Part I
Read pages 316 – 319
Complete both sides

10. Check your answers Re-teaching SECTION: WHAT ARE INFECTIOUS DISEASES?
Part I
bacteria
virus
protozoan
4. fungus
5. bacteria
6. virus
7. virus
Part II
15. sneezing, coughing, breathing, touching
objects, kissing, drinking from the
same glass, sexual contact
16. food contamination, drinking water
from streams and lakes, drinking
untreated water exposed to sewage or
animal wastes
17. on objects like your phone or money,
in soil
18. in or on animal bodies, even your pets;
animal or insect bites
8. fungus
9. bacteria
10. Virus
11. Bacteria
12. Virus
13. Bacteria
14. parasite
Check your answers

11. Handout 1 Concept Review
Check your answers
Handout 1 Concept Review
WHAT ARE INFECTIOUS DISEASES?
flu, cold, tuberculosis, malaria, athlete’s
foot, measles, food poisoning
Caused by: fungi, bacteria, protozoa,
Viruses, parasites
Spread by: food and water, animals,
Environment, person to person

12. How Are Infectious Diseases Treated?
Section 1 What Are Infectious Diseases?
Chapter 13
How Are Infectious Diseases Treated?
Antibiotics are medicines used to kill or slow the growth of bacteria. Examples include penicillin, tetracycline, and streptomycin.
Antibiotic resistance is a condition in which bacteria can no longer be killed by a particular antibiotic.
Improper use of antibiotics contributes to the growth of antibiotic-resistant bacteria.
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13. Chapter 13 Section 1 What Are Infectious Diseases?
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14. How Your Body Fights Disease
Section 2 Protecting Yourself from Infectious Diseases
Chapter 13
How Your Body Fights Disease
Physical barriers to pathogens include:
Skin
Mucous membranes
Chemicals
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Inflammation is a reaction to injury or infection characterized by pain, redness, and swelling.

15. ** How Your Body Fights Disease
Section 2 Protecting Yourself from Infectious Diseases
Chapter 13
** How Your Body Fights Disease
The immune system is the body’s system for fighting disease once it is in the body.
White blood cells are cells in the blood that defend the body against disease.
Antibodies are proteins that mark pathogens to be destroyed by white blood cells.
The lymphatic system is a network of vessels that carry lymph throughout the body, carrying viruses and bacteria back to the lymph nodes.
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16. SECTION: How Your Body Fights Disease
Handout 2
SECTION: How Your Body Fights Disease
Part 2
Read pages 324 – 325
Complete both sides

17. IMMUNE SYSTEM Check your answers 1. The immune system’s function is to
defend the body against disease by recognizing,
attacking, and destroying alien
invaders such as viruses and bacteria.
2. A weakened form of virus is introduced
into the system when a person
is vaccinated. This triggers the formation
of antibodies, which destroy the
virus. Antibodies remain in the system
as long-term protection against the
virus. They are important to prevent
contraction of diseases such as polio
or rubella.
3. Swollen glands may mean that your
lymph nodes are at work filtering
germ particles and damaged cells from
an infection.
4. Student answers may vary. Students
may suggest that nutrition and rest or
reduction of stress will aid the
immune system.
IMMUNE SYSTEM

18. SECTION: PROTECTING YOURSELF FROM INFECTIOUS DISEASES
1. antibodies; blood cells
2. pathogens
3. blood vessels; lymphatic system
4. fluid
5. white blood cells
6. destroy
7. memory cells
Check your answers

19. What You Can Do to Stay Well
Section 2 Protecting Yourself from Infectious Diseases
Chapter 13
What You Can Do to Stay Well
Protect yourself.
Eat a healthy, balanced diet.
Drink plenty of water.
Reduce your stress levels.
Exercise regularly.
Get regular medical checkups.
Avoid close contact with sick people.
Get enough sleep.
Stay up to date on all available vaccines.
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20. How to Prevent the Spread of Disease
Section 2 Protecting Yourself from Infectious Diseases
Chapter 13
How to Prevent the Spread of Disease
Get vaccinated.
Keep clean by washing with soap frequently.
Don’t share food, drinks, or personal items such as toothbrushes.
Cover your mouth when you sneeze or cough.
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21. What to Do When You Are Sick
Section 2 Protecting Yourself from Infectious Diseases
Chapter 13
What to Do When You Are Sick
Stay home and rest.
Drink plenty of fluids.
Throw away tissues you use right away.
Follow all the directions your doctor gives.
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22. Diseases Affect Everybody
Section 3 Common Infectious Diseases
Chapter 13
Diseases Affect Everybody
No matter how healthy we are, we all become ill from diseases sometimes.
There are so many pathogens in so many places it is impossible to avoid them.
The best defense against pathogens is avoiding behaviors that increase our chances of infection.
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23. Chapter 13 Section 3 Common Infectious Diseases
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24. Chapter 13 Section 3 Common Infectious Diseases
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25. Life Skills TREATING A DISEASE
Part I
1. mononucleosis, virus
2. measles, virus
3. strep throat, bacteria
Part II
4. Only Jake could be prescribed an
antibiotic because bacteria causes his
disease. Antibiotics kill or slow the
growth of bacteria. Enrique and Robin
should not be prescribed an antibiotic
because antibiotics have no effect on
viruses.
5. People should take the full course of
the antibiotic. Stopping the medication
too early may allow bacteria to continue
to grow, resulting in a relapse of
the disease.
Check your answers