1 / 19

Chapter 2: The Structure of Viruses and Cells

Chapter 2: The Structure of Viruses and Cells. VIRUSES. Virus - piece of hereditary material covered by protein that infects & reproduces ONLY inside a living cell The living cell is called a host cell. VACCINES. Vaccine- made from damaged virus particles that can ’ t cause disease anymore

lyris
Download Presentation

Chapter 2: The Structure of Viruses and Cells

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chapter 2: The Structure of Viruses and Cells

  2. VIRUSES • Virus- piece of hereditary material covered by protein that infects & reproduces ONLY inside a living cell • The living cell is called a host cell

  3. VACCINES Vaccine- made from damaged virus particles that can’t cause disease anymore Edward Jenner (1796) - Developed the first vaccine for smallpox

  4. Latent vs. Active Viruses • Latent- appear to “hide” inside host cell for a certain period of time, until there is a stimulus • Herpes, mononucleosis, HIV, invading flu, cancer • Active- exhibiting symptoms for the disease • AIDS, flu with symptoms

  5. Viral Diseases

  6. HIV/AIDS HIV = human immunodeficiency virus AIDS = acquired immune deficiency syndrome HIV is the virus that causes the disease AIDS. HIV is spread through: sexual contact, sharing needles with an infected person, blood & body fluids, infected mother to unborn child

  7. How does temperature affect viruses?Graphing Activity page 37

  8. Things to put in your line graph • Title: The Impact of Temperature on the Number of Viruses • Label the x and y axis (x is temperature (C); y is number of viruses (millions) ). • Intervals for y, each line is 0.05, but just label 0.1, 0.2, etc. (skip two boxes, one line break) • Break on x axis • Use whole numbers on x axis, start at 36 and skip 5 boxes b/w each number. • Put your name in upper right hand corner, include t-chart, degrees C on points (dots), questions answered on back.

  9. Answer the following questions on the back of your graph. • What happens to the number of viruses as the temperature increases? • Why do we get a fever when a virus is attacking our body? • What would happen if one had a virus in his/her body, but his/her immune system did not respond?

  10. Cells • Cell:The smallest unit of life. The smallest unit of an organism that can perform all life functions. (grow, reproduce, attain energy and get rid of waste, adaptation)

  11. Cell Theory • All organisms are made up of one or more cells. • Cells are the basic units of structure and function in all organisms. • All cells come from cells that already exist.

  12. Discovering Cells • Robert Hooke first observed cells. (1665) He viewed a piece of cork under a microscope and saw small boxes that looked like cells in a monastery. You see this He drew this

  13. Microscopes • Simple (1 lens) • Anton van Leeuwenhoek • Complex (2 lenses) • Zacharias Janssen Compound Light Microscope

  14. Prokaryotic vs. Eukaryotic Cells

  15. The Animal Cell

  16. Diagram of Animal Cell

  17. Plant Cell • Plant cells have the same organelles as an animal cell except with the addition of two: • Cell Wall – Extra protection for the plant, rigid • Chloroplast – Makes energy for the cell, photosynthesis • Light energy is trapped in a green pigmented chemical (chlorophyll), and changed into chemical energy in the form of a sugar.

  18. Plant Cell

  19. Diagram of Plant Cell

More Related