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Viruses Gaiser Life Science Know What do you know about viruses? “I don’t know anything.” is not an acceptable answer. Use complete sentences. Evidence After listening to the PowerPoint lecture, come back here and list evidence to explain why your answer to the above question is or is not a good answer. You may also use other outside sources to help you respond. Page # Clarifying ?s Viruses Information virus - small, non-living particles that invade and reproduce inside cells Non-living - don’t use energy to grow or respond to surroundings – no respiration How do they get energy? host - Living organism that provides energy parasite - Organism that lives on or in a host – is almost always harmful to the host bacteriophage - Virus that infects bacteria structure - outer protein coat with genetic material inside reproduction 1. Virus attaches to cell and enters cell. 2. Genetic material takes over cells functions. 3. Cell produces virus’ genetic material – virus uses cell to reproduce. 4. Cell becomes too full of viruses. Cell ruptures and releases new viruses. Page # Clarifying ?s types of viruses Viruses Information active - Virus immediately takes over and destroys cell. hidden - Virus remains dormant inside the cell, then takes over. Disease causing viruses Virus caused diseases are often deadly, usually infectious (means you can catch them from others), and frequently incurable. Some viruses are preventable with vaccination though. Examples: Some deadly virus diseases are AIDS, polio, smallpox, ebola, and rabies Examples: Some relatively harmless virus diseases are the common cold, chicken pox, warts, and cold sores. FYI: Different people can be affected differently by virus diseases. Young babies have underdeveloped immune systems. Elderly people sometimes have weakened immune systems. AIDS victims have compromised immune systems. All of these groups can be at greater risk when contracting virus diseases. Influenza – AKA flu vaccine Summary: Flu viruses mutate rapidly and change from year to year. They cause fevers and aches and pains for approximately two weeks in the victims. The flu can often be prevented with an vaccination. - Activates the body’s natural defenses by introducing dead or weakened viruses into the body. Page # Clarifying ?s Viruses Information virus - small, non-living particles that invade and reproduce inside cells Non-living - don’t use energy to grow or respond to surroundings – no respiration How do they get energy? host - Living organism that provides energy parasite - Organism that lives on or in a host – is almost always harmful to the host bacteriophage - Virus that infects bacteria structure - outer protein coat with genetic material inside reproduction 1. Virus attaches to cell and enters cell. 2. Genetic material takes over cells functions. 3. Cell produces virus’ genetic material – virus uses cell to reproduce. 4. Cell becomes too full of viruses. Cell ruptures and releases new viruses. Page # Clarifying ?s types of viruses Viruses Information active - Virus immediately takes over and destroys cell. hidden - Virus “hibernates” inside cell, then takes over. Disease causing viruses Virus caused diseases are often deadly, usually infectious (means you can catch them from others), and frequently incurable. Some viruses are preventable with vaccination though. Examples: Some deadly virus diseases are AIDS, polio, smallpox, ebola, and rabies Examples: Some relatively harmless virus diseases are the common cold, chicken pox, warts, and cold sores. FYI: Different people can be affected differently by virus diseases. Young babies have underdeveloped immune systems. Elderly people sometimes have weakened immune systems. AIDS victims have compromised immune systems. All of these groups can be at greater risk when contracting virus diseases. Influenza – AKA flu vaccine Summary: Flu viruses mutate rapidly and change from year to year. They cause fevers and aches and pains for approximately two weeks in the victims. The flu can often be prevented with an vaccination. - Activates the body’s natural defenses by introducing dead or weakened viruses into the body. Page # This PowerPoint was created by Tim Paterek from Charlene Shea’s lab notes. All pictures came from Google Image Search. To fall within the Fair Use Guidelines, this PowerPoint must be used within the confines of the classroom and may not be published back onto the Internet unless the pictures are removed.
