1. Bacteria, Viruses, and Immunity

2. What is a bacteria?
Single-celled prokaryote(no nucleus)

3. What is a virus? Non-living biological particle
Can not reproduce on its own!!!
Uses host cells for reproduction
Does not use energy!!
Made of protein and nucleic acids(DNA or RNA)

4. How do viruses infect us?
Lytic Cycle- causes quick viral replication(flu)
Lysogenic Cycle- causes a delayed viral replication(HIV)

5. How do we defend ourselves?
Active Immunity
Development of anti-bodies after first infection
1) Natural- anti-bodies created by immune system
2) Artificial- anti-bodies stimulated by a vaccine
Passive Immunity
Development of anti-bodies during pregnancy
Anti-bodies are passed from mother to child

6. Active Immunity T Cells Destroy Infected Cells:
B Cells make anti-bodies to destroy Pathogens:

7. Anti-bodies passed during pregnancy or breast-feeding
Passive Immunity
Anti-bodies passed during pregnancy or breast-feeding

8. VOCABULARY: Prokaryote Virus Lytic and Lysogenic Cycle Active Immunity
Passive Immunity
Pathogen
B Cells
T Cells
Anti-bodies