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Thursday, February 28, 2013

Hela cells

Hela cells are the first immortal cell line ,or a cell line that continues to reproduce and live outside the human body.They are research into cancer. AIDS, the effects of radiation and toxic substances, gene mapping , and countless other scientific pursuits. I learned a lot of stuff about hela cells it was great that they help others in the 60 years they had her cells. They should of told her family but they wait 25 years to tell them that they where using their mother cells to help other that has cancer and they been found more things about henrietta lacks cells. Her cells are medical break thoughts world wide. http://youtu.be/1vow1ePzuqo

Wednesday, February 20, 2013

vocabulary list

cholesterol-A carbon-based steroid molecule that provides permeability and fluid to plasma membranes. Cholesterol gets a bad rap for clogging and causing heart attacks when present in the body in excessive amounts. vacuole-Fluid-filled,membrane-surrounded cavities inside a cell. The vacuole fills with food being digested and waste material that is on its way out of the cell. Nucleolus- A structure inside the nucleus where RNA is transcribed. chloroplast- an egg shaped body that appears green from all the chlorophyll they contain. This organelle is where photosynthesis take place. cell wall- most made of cellulose,this is the tough and rigid outer layer of plant cells. Histone- Large protein complexes that control the messages sent from the DNA to rest of the cell. protein- A chain, of amino acids specifically folded to take on certain shape,one that determines the protein's function. All enzymes are proteins, but all proteins are enzymes.Tricky how that works. Golgi Body- An organelle in eukaryotic cells containing between three and seven flattened membrane disk called cisternae. The golgi body packages and processes proteins and lipids, and is also called the. Stack of pancakes anyone?

what did you notice about the different types of cells?

I learn a lot about the different cells. Their are so many different cells in the animal and plants like some are shape like snowflakes,balls,cubes,saucers,rectangles,boxes,coils or blobs of jelly. The reason plants and and animal come different size depend on their cell. Size of the cells don't matter it's the told of number of cells that make up the plants or animals.

Saturday, February 16, 2013

plant cells and nimal cell differences

They have several difference and similarities thing Plant Cells: have chloroplasts and use photosynthesis to produce food have cell wall made of cellulose A plant cell has plasmodesmata - microscopic channels which traverse the cell walls of the cells one very large vacuole in the center are rectangular in shape Animal Cells: don't have chloroplast no cell wall (only cell membrane) No plasmodesmata one small vacuole either circular, irregular or defined shapes depending on the type of cell similarities 1. both undergo cellular respiration in the mitochondria 2. mitosis and meiosis 3. both have cells 4. both require water to survive 5. both have a vascular system 6. both use energy 7. both respond to stimuli 8. both reproduce 9. both grow and develop