Journal Time September 4, 2013
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Transcript of Journal Time September 4, 2013
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Journal TimeSeptember 4,
2013
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Journal
1. Should outsiders go into areas where this virus is active?
2. What responsibility do Americans and other countries with advanced medicine have to world health?
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Ebola Outbreak Uganda
http://www.youtube.com/watch?v=aE69K_lP2ughttp://www.youtube.com/watch?v=JuVY_kQfDhk
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Layered Look Book~ Step One: Use four plain white pieces of paper. Line them up with each sheet 1 inch lower than the next sheet.~ Step Two: Turn the sheets around near your tummy. Then fold the top of the sheets down leaving the 1 inch margin between all layers.~ Step Three: When all the layers are even, crease the top and staple across the crease.
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Layer # 1:What is a Virus?~ A small, nonliving particle that invades and then reproduces inside a living cell.~ Biologists consider viruses to be nonliving because viruses are not cells. Do not meet all characteristics of living organism.
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~ Only living characteristic is their ability to multiple.~ This process is special because it requires a host cell.~ A host is a living thing that provides a source of energy for a virus or an organism.~ Organisms that live on/in a host causing harm are parasites.~Viruses are like parasite because they destroy their host cell to multiply.
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~ No organisms are safe from viruses.
~ Viruses are special in the specific cells they infect.
Cold viruses typically infect cells of the nose and throat.
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Layer #2Naming Viruses
- Since viruses are nonliving, normal names are not assigned.
- They are named after the disease they cause, founder or the organism they infect.
- The Ebola Virus was named after the location in Africa where it was discovered.
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Layer #3Shapes and Sizes of VirusesRod Shaped: linear Spherical Shaped: actually 20 sided polygons.- These are the smaller virus
types.- Smaller in animals and
plants.- Virtually undetectable
under even the most powerful of microscopes.
- 20 – 250 nanometers- Average 50 – 60 nanometers
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Bacteriophage• With its six legs, the
bacteriophage attaches to the surface of the much larger bacteria
• Once attached, the bacteriophage injects DNA into the bacterium. The DNA instructs the bacterium to produce masses of new viruses.
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Layer #4Structure of Viruses
All viruses have two basic parts: an outer coat that protects the virus and an inner core made of genetic material.
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Coat- Outer coat made of
certain proteins that allow it to fit into certain host cells.
- Because this is so specific a virus will only attach to one or a few types of cells.
- Example: HIV can only attach to one kind of human white blood cell.
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http://www.youtube.com/watch?v=Rpj0emEGShQ