1. HW # 49- Work on your Cell Essay Rough draft -Due tomorrow Final Essay-Due Wednesday (12/19) Warm up Week 14, Day Three

2. Warm up Response

3. Homework Response/Check D

4. Make an outline for your essay. Be sure to have a strong thesis statement (A cell is like a(n) ______________. And supporting details. Be sure that you explain the roll of each organelle in you analogy and WHY it is so.

5. Cell Structure & Function http://koning.ecsu.ctstateu.edu/cell/cell.html Extra slides for information and study

6. Cell Theory All living things are made up of cells. Cells are the smallest working units of all living things. All cells come from preexisting cells through cell division.

7. Definition of Cell A cell is the smallest unit that is capable of performing life functions.

8. Examples of Cells Amoeba Proteus Plant Stem Red Blood Cell Nerve Cell Bacteria

9. Two Types of Cells Prokaryotic Eukaryotic

10. Prokaryotic Do not have structures surrounded by membranes Few internal structures One-celled organisms, Bacteria http://library.thinkquest.org/C004535/prokaryotic_cells.html

11. Eukaryotic Contain organelles surrounded by membranes Most living organisms PlantAnimal http://library.thinkquest.org/C004535/eukaryotic_cells.html

12. “ Typical ” Animal Cell http://web.jjay.cuny.edu /~ acarpi/NSC/images/cell.gif

13. http://waynesword.palomar.edu/images/plant3.gif “ Typical ” Plant Cell

14. Cell Parts Organelles

15. Surrounding the Cell

16. Cell Membrane Outer membrane of cell that controls movement in and out of the cell Double layer http://library.thinkquest.org/12413/structures.html

17. Cell Wall Most commonly found in plant cells & bacteria Supports & protects cells http://library.thinkquest.org/12413/structures.html

18. Inside the Cell

19. Nucleus Directs cell activities Separated from cytoplasm by nuclear membrane Contains genetic material - DNA

20. Nuclear Membrane Surrounds nucleus Made of two layers Openings allow material to enter and leave nucleus http://library.thinkquest.org/12413/structures.html

21. Chromosomes In nucleus Made of DNA Contain instructions for traits & characteristics http://library.thinkquest.org/12413/structures.html

22. Nucleolus Inside nucleus Contains RNA to build proteins http://library.thinkquest.org/12413/structures.html

23. Cytoplasm Gel-like mixture Surrounded by cell membrane Contains hereditary material

24. Endoplasmic Reticulum Moves materials around in cell Smooth type: lacks ribosomes Rough type (pictured): ribosomes embedded in surface http://library.thinkquest.org/12413/structures.html

25. Ribosomes Each cell contains thousands Make proteins Found on ribosomes & floating throughout the cell http://library.thinkquest.org/12413/structures.html

26. Mitochondria Produces energy through chemical reactions – breaking down fats & carbohydrates Controls level of water and other materials in cell Recycles and decomposes proteins, fats, and carbohydrates http://library.thinkquest.org/12413/structures.html

27. Golgi Bodies Protein 'packaging plant' Move materials within the cell Move materials out of the cell http://library.thinkquest.org/12413/structures.html

28. Lysosome Digestive 'plant' for proteins, fats, and carbohydrates Transports undigested material to cell membrane for removal Cell breaks down if lysosome explodes http://library.thinkquest.org/12413/structures.html

29. Vacuoles Membrane-bound sacs for storage, digestion, and waste removal Contains water solution Help plants maintain shape http://library.thinkquest.org/12413/structures.html

30. Chloroplast Usually found in plant cells Contains green chlorophyll Where photosynthesis takes place http://library.thinkquest.org/12413/structures.html

31. Quick Review Which organelle is the control center of the cell? Nucleus Which organelle holds the cell together? Cell membrane Which organelles are not found in animal cells? Cell wall, central vacuole, chloroplasts Which organelle helps plant cells make food? Chloroplasts What does E.R. stand for? Endoplasmic reticulum http://www.youtube.com/watch?v=rABKB5aS2Zg&NR=1