| A | B |
|---|
| Virus | A strand of hereditary material surrounded by a protein coating |
| host cell | Living cell in which a virus can actively mulitply or in which a virus can hide until activated by environmental stimuli |
| Latent | in cell but not effecting it. Cell can cope hereditary material can be laten for years. |
| How viruses effect organisms | 1. infect only specific kinds of cells2. limited to 1 host species |
| how viruses move | Cannot move by self. Injest (surface) or inhaled |
| Bacteriaphages | Virus that infect bacteria. They enter bacteria and relese hereditary material |
| Fighting Viruses | Vaccines used to prevent disease, made from weakened virus particles that can't cause diseases ( measeles, chickepox, polio, rabies, small pox) |
| The First Vaccine | Edward Jenner, 1796, small pox |
| Treating Viral Diseases | Antibiotics wont effect viruses. Body stops viral infections using interferons (antibody) |
| Steps to treating Viral Diseases | 1. Virus infected cells produce interferons rapidly 2) move to non infected cells 3) Cause non infected cell to produce protective substances |
| Prevent Viral Diseases- Public Health Measures | Vaccinating, sanitation, quarantining patients, controlling animals that spread disease |
| Research Gene Therapy | Substitute normal hereditary material for a cells defective hereditary material using a virus. |
| Virus:Strand of hereditary material (DNA, RNA) surrounded by a protein coating | DNA/RNA is coded forbad things. make new virus. Not alive. Nor organelles, Variety of shapes |
| How do viruses multiply | Must have host cell to copy themselves |
| Once in a host cell: Active | Causes host cell to make new viruses |
| How do they become active? | Attach to host cell, inject hereditary material into host cell, host cell divides and makes new viruses, rupture cell membrane, new virus go to uninfect cell. |
