Today’s EQ: How does our body fight off diseases and infections?

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Presentation transcript:

Today’s EQ: How does our body fight off diseases and infections? Homework: Begin to study for Unit Test Wednesday

Guided Reading 27.1 Essential Question: How does our immune system help maintain homeostasis? By fighting off infections and disease-causing pathogens inside our bodies. 2. What is the major task performed by the immune system? Protects the body from diseases.

Guided Reading 27.1 continued… 3. What is the difference between an infectious and noninfectious disease? Infectious- caused by pathogens that can be spread from one to another. Noninfectious- cannot spread from one person to another. 4. Describe 5 ways that pathogens are passed from one person to another. Air, Contaminated objects, person to person, animals, and food/water

Guided Reading 27.1--Continued 5. Describe why we give a person a vaccine shot. It is a killed or treated pathogen that your body recognizes and builds defenses against that disease. 6. What is an antibiotic? Does it work against both bacterial and viral infections? It is a substance that kills bacteria and other microorganisms, but it does not work against viruses (which aren’t living organisms).

7. Draw and briefly describe your immune response to a virus.

8. What is cancer and what are some environmental factors that can cause cells to become cancerous? When cells divide at an uncontrollable rate. It can be caused radiation exposure (like the sun or like an a-bomb), smoking, and some is hereditary.

TOTD: How does the human body help you fight off a bacteria? A virus?