Notes 9-1

VirusesNotes 9-1What is a Virus?Tiny, Non-living particleInvades a living cell, then multipliesOrganism invaded is called a host

The Structure of VirusesAll 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.3BacteriophageVirus that infects a bacteriaMeans bacteria eater

Active versus hidden virusesActive viruses enter cell and immediately take over and begin multiplyingHidden viruses hide for a while, possibly years, before it becomes active

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

6How Viruses MultiplyHidden viruses hide for a while inside host cells before becoming active.

7Common Viral DiseasesFluColdHIV/ AIDSHerpesWartsRabiesChicken Pox

Spreading Viral DiseasesBodily fluidsAnimal bitesMoisture in aircontact

Treating viral diseasesNo cureSome medications can relieve symptomsNeed to rest, drink fluids, eat healthyVaccines help prevent viruses- release chemicals that stimulate the bodys natural defense

Comparing Microorganisms

Tree manhttp://youtu.be/Gs0fGo6rgQ0http://youtu.be/yLsxf_Zgp_Qhttp://youtu.be/XciH2aZyan8http://youtu.be/rGbhXPmFLAYhttp://youtu.be/yaWxrxlloEQhttp://youtu.be/KJ4G2mXda1U