1. Notes 9-1
Viruses

2. What is a Virus? Tiny, Non-living particle
Invades a living cell, then multiplies
Organism invaded is called a host

3. The Structure of Viruses
All viruses have two basic parts: a protein coat that protects the virus and an inner core made of genetic material. Some viruses are surrounded by an outer membrane envelope.

4. Bacteriophage
Virus that infects a bacteria
Means “bacteria eater”

5. Active versus hidden viruses
Active viruses enter cell and immediately take over and begin multiplying
Hidden viruses hide for a while, possibly years, before it becomes active

6. How Viruses Multiply
Active viruses enter cells and immediately begin to multiply, leading to the quick death of the invaded cells.

7. How Viruses Multiply
Hidden viruses “hide” for a while inside host cells before becoming active.

8. Common Viral Diseases Flu Cold HIV/ AIDS Herpes Warts Rabies
Chicken Pox

9. Spreading Viral Diseases
Bodily fluids
Animal bites
Moisture in air
contact

10. Treating viral diseases
No cure
Some medications can relieve symptoms
Need to rest, drink fluids, eat healthy
Vaccines help prevent viruses- release chemicals that stimulate the body’s natural defense

11. Comparing Microorganisms

12. Tree man http://youtu.be/Gs0fGo6rgQ0 http://youtu.be/yLsxf_Zgp_Q