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Transcript
Name: _______________________ Mrs. Rodriguez Period _____ Date: ____________ Review Sheet – Cells Answer the following questions. Use full sentences. 1. Explain how each of the following scientists contribute to the development of the Cell Theory: a) Robert Hooke In 1665 he looked at cork and saw box like structures that he called cells. Hooke also developed the compound microscope. b) Anton Von Leewenhoek 1683, he saw “Wee Beasties” in a sample of pond water using a simple microscope._______________________________________________ c) Matthias Schleiden Theorized that all plants are made of cells. _______________________ d) Theodor Schwann Theorized that all animals are made of cells.______________________ e) Rudolf Virchow Observed dividing cells and stated that all cells must come from cells that already exist.________________________________________ 2. What are the three points of the Cell Theory? 1) All organisms are made of one or more cells. _____________________ 2) The cell is the basic unit of structure and function in living things. _____ 3) All cells come form cells that already exist. ______________________ 3. How did the cell get its name? Robert Hooke called the box like structures he saw in cork cells because they reminded him of monastery cells. 4. What cell parts are found in only plant cells? Cell Wall and Chloroplast are only found in plant cells. ________________ 5. What cell part is found in only animal cells? Centrioles are only found in animal cells ____________________________ 6. Define diffusion. Diffusion is when molecules move from a more crowded place to a less___ cowded place_________________________________________________ 7. Define passive transport. Passive transport is when molecules move across the cell membrane from _ where they are more crowded to where they are less crowded.___________ 8. Define active transport. Active transport is when molecules move across the cell membrane from __ where they are less crowded to where they are more crowded. ___________ 9. During passive transport do cells have to use its own energy? NO_ 10. During active transport do cells have to use its own energy? YES__ 11. Define osmosis. Osmosis is the diffusion of water across the cell membrane.____________ 12. What might happen to an animal cell if it gains too much water? If an animal cell gains too much water it will swell and may burst. This is ___ because an animal cell does not have a cell wall. _____________________ 13. What do we call the process by which a cell shrinks due to water loss? Plasmolysis is the process by which a cell shrinks due to water loss. _____ PLANT ANIMAL CELL CELL ORGANELLE FUNCTION (Cell Part) (What does it do?) y y Nucleus y y Nucleolus y y Cell Membrane Controls the cell Produces (makes) ribosome’s Outer layer of the cell – the gate keeper y y Cytoplasm Jelly like substance that holds all the organelles in place y y Endoplasmic Transports materials all over the Reticulum cell y y Ribosomes Produces proteins y y Golgi Body Packages materials and sends (Apparatus) them to places around the cell y y Mitochondrion Power house of the cell – makes energy (ATP) y y Lysosomes y y Vacuole Hold and gets rid of waste Storage for water, food, etc. bigger in plants n y Centrioles Helps with cell division only in animal cells y y Nuclear Membrane Surrounds the nucleus. y n Cell Wall Supports the plant cell y n Chloroplast Hold chlorophyll – where photosynthesis occurs.