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.
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
