Immune+system+BA

PATHOGENS

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1. What is a pathogen? Viruses and Bacteria

2. What are the body's three lines of defense against pathogens? Our immune system

3. Write a one paragraph summary of bacteria. Bacteria are prokariotic. They are one celled and also lack a nuclie. Rod, Sphirical and Spirillum are the three body types of bacteria.The bacteria stores its DNA in the center of its body. This DNA is what makes the cell be able to become immune to anti-biotics

4. Write a one paragraph summary of viruses. Viruses can considered biotic or abiotic. They are kind of in between the two. They are more like chemicals than organisms. They must have a host organism to live and thrive. They are acellular. Aids is a virus. Viruses are like microscopic parasites.

5. What is an emerging virus? and emerging virus is a virus that comes about in the body

IMMUNE SYSTEM

6. What is an antibody? A cell that respnds to antigens What do they do? they fight of bacteria and viruses

7. What is B Cell? an antigen that produces memory b cells

8. What is a Cytotoxic T Cell? antigens that kill cancer

9. What is a Helper T Cell? a cell in the immune system that fights of viruses

10. What is an antigen? How does the body respond to an antigen? a foreign substance that causes the body to react