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Warm-Up

Warm-Up. Please take out your item analysis that we did in lab yesterday as well as your interactive notebook. Cell Structure & Function. http://koning.ecsu.ctstateu.edu/cell/cell.html. Cell Theory. All living things are made up of cells.

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Warm-Up

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  1. Warm-Up • Please take out your item analysis that we did in lab yesterday as well as your interactive notebook.

  2. Cell Structure & Function http://koning.ecsu.ctstateu.edu/cell/cell.html

  3. 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.

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

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

  6. Two Types of Cells Prokaryotic (no nucleus) Eukaryotic (contains a nucleus)

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

  8. Eukaryotic • Contain organelles surrounded by membranes • Most living organisms Plant Animal http://library.thinkquest.org/C004535/eukaryotic_cells.html

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

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

  11. Warm-Up • Get out your power point cell note-taking worksheet from yesterday.

  12. Cell Parts Organelles

  13. Surrounding the Cell

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

  15. Cell Wall • Only in plant cells & bacteria • Outer membrane that supports & protects cells • Made of cellulose http://library.thinkquest.org/12413/structures.html

  16. Inside the Cell

  17. Nucleus • Directs cell activities • Separated from cytoplasm by nuclear membrane • Contains genetic material – DNA • A structure called the nucleolus is also found in the nucleus.

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

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

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

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

  22. 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

  23. Ribosomes • Each cell contains thousands • Make proteins • Found on Rough E.R & floating throughout the cell http://library.thinkquest.org/12413/structures.html

  24. 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

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

  26. Lysosome • Digestive 'plant' for proteins, fats, and carbohydrates • Removes waste • Cell breaks down if lysosome explodes http://library.thinkquest.org/12413/structures.html

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

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

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