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Transcript
Cell Features Agriculture Biology Board Work Name two difference between a Light Microscope and an Electron Microscope. Who is credited with discovering cells? Activity Instructions Each table needs to get a volunteer to grab the three various sized cubes stationed in the back Cube Width and Height: 1 cm 2 cm 3 cm Once each group has the three potato cubes work together to complete the activity sheet. Record your information Surface Area to Volume Ratio 60 50 40 30 Surface Area 20 Volume 10 0 Cube 1 Cube 2 Cube 3 Cell Theory All living things are made of one or more cells Cells are the basic units of structure and function in organisms All cells arise from existing cells Common Features of Cells The cell interior is called the Cytoplasm Cytosol: fluid in the cytoplasm Microscopic fibers called the cytoskeleton in the cytoplasm help suspend structures Ribosomes: cellular structure on which proteins are made Common Features of Cells Cell membrane Encloses cell Separates the cell interior from surroundings Regulates what leaves and enters Gases nutrients and waste Cell Membrane Fluid not stiff Cell Membrane Structure Made of a double layer of phospholipids Called the lipid bilayer Polar Head: Made of phosphate group Attracted to water (hydrophilic) Non-polar tails: Made of two fatty acids Repel water (hydrophobic) The two types of Cells Prokaryotes No nucleus Cell Wall surrounding the membrane No internal support skeleton Eukaryote Has a nucleus Cell membrane Cytoskeleton Prokaryotes Simple, Singled Cell Organisms Example: Bacteria DNA is suspended in the cytoplasm Flagella: long structures to help move the cell around. Eukaryotic Cells Contains a Nucleus Example: YOU, animals! DNA is housed in the Nucleus Contains Organelles: Perform various activities Cilia: Can help propel like flagella or Move substances