hw # 49 - work on your cell essay rough draft -due tomorrow final essay-due wednesday (12/19)
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Week 14, Day Three. HW # 49 - Work on your Cell Essay Rough draft -Due tomorrow Final Essay-Due Wednesday (12/19) Warm up. Warm up Response. Homework Response/Check. D. Goals for Today. Make an outline for your essay. - PowerPoint PPT PresentationTRANSCRIPT
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HW # 49- Work on your Cell EssayRough draft -Due tomorrowFinal Essay- Due Wednesday (12/19)
Warm up
Week 14, Day Three
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Warm up Response
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Homework Response/CheckD
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Goals for Today
• 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.
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Cell Structure & Function
http://koning.ecsu.ctstateu.edu/cell/cell.html
Extra slides for information and study
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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.
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Definition of Cell
A cell is the smallest unit that is capable of performing life functions.
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Examples of Cells
Amoeba Proteus
Plant Stem
Red Blood Cell
Nerve Cell
Bacteria
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Two Types of Cells
•Prokaryotic•Eukaryotic
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Prokaryotic
• Do not have structures surrounded by membranes
• Few internal structures
• One-celled organisms, Bacteria
http://library.thinkquest.org/C004535/prokaryotic_cells.html
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Eukaryotic• Contain organelles surrounded by membranes• Most living organisms
Plant Animal
http://library.thinkquest.org/C004535/eukaryotic_cells.html
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“Typical” Animal Cell
http://web.jjay.cuny.edu/~acarpi/NSC/images/cell.gif
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http://waynesword.palomar.edu/images/plant3.gif
“Typical” Plant Cell
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Cell Parts
Organelles
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Surrounding the Cell
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Cell Membrane
• Outer membrane of cell that controls movement in and out of the cell
• Double layer
http://library.thinkquest.org/12413/structures.html
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Cell Wall
• Most commonly found in plant cells & bacteria
• Supports & protects cells
http://library.thinkquest.org/12413/structures.html
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Inside the Cell
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Nucleus
• Directs cell activities• Separated from cytoplasm by nuclear
membrane• Contains genetic material - DNA
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Nuclear Membrane
• Surrounds nucleus• Made of two layers• Openings allow material
to enter and leave nucleus
http://library.thinkquest.org/12413/structures.html
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Chromosomes
• In nucleus• Made of DNA• Contain instructions for
traits & characteristics
http://library.thinkquest.org/12413/structures.html
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Nucleolus
• Inside nucleus• Contains RNA to build
proteins
http://library.thinkquest.org/12413/structures.html
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Cytoplasm
• Gel-like mixture• Surrounded by cell membrane• Contains hereditary material
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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
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Ribosomes
• Each cell contains thousands
• Make proteins• Found on ribosomes &
floating throughout the cell
http://library.thinkquest.org/12413/structures.html
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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
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Golgi Bodies
• Protein 'packaging plant'
• Move materials within the cell
• Move materials out of the cell
http://library.thinkquest.org/12413/structures.html
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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
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Vacuoles
• Membrane-bound sacs for storage, digestion, and waste removal
• Contains water solution• Help plants maintain
shape
http://library.thinkquest.org/12413/structures.html
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Chloroplast
• Usually found in plant cells
• Contains green chlorophyll
• Where photosynthesis takes place
http://library.thinkquest.org/12413/structures.html
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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