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Download Microscopes allow us to see inside the cell
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Transcript
Microscopes allow us to see inside the cell • Microscope is an important tool. • Cells are diverse (very different) • Plants & Animals have EUKARYOTIC cells. Microscope is an important tool • Light microscopes (using lenses to bend light & magnify) led to discovery of Cell Theory. Can magnify up to 1000 times and can view living cells. • Scanning Electron Microscope (SEM) & Transmission Electron Microscope (TEM) use electrons to produce images. Can magnify up to 1 million times but not view living organisms. CELLS ARE DIVERSE • Every Cell has a protective covering, the CELL MEMBRANE. • CYTOPLASM is a gelatin-like fluid within the membrane where most of the cell work is done. • EUKARYOTIC cells have a nucleus containing its genetic material. (most multicellular) • PROKARYOTIC cells have its genetic material float throughout the cytoplasm with no nucleus. (most unicellular are prokaryotes) • ORGANELLES are any part of a cell enclosed within its own membrane. PLANTS & ANIMALS HAVE EUKARYOTIC CELLS • Plant cells have CELL WALLS: tough, nonliving covering outside of c.membrane • CHLOROPLASTS: found in plant cells; captures sun’s energy to make sugar • MITOCHONDRIA: in both plant & animal; use oxygen to release energy from food/sugar. • ENDOPLASMIC RETICULUM: system of winding membranes outside of nucleus; used in making & transporting proteins & parts of cell membrane PLANT & ANIMALS HAVE EUKARYOTIC CELLS • RIBOSOMES: receives data from nucleus to build proteins to place in the E.R. • VESICLES: small packages that break off of E.R. to transport material to Golgi apparatus. • GOLGI APPARATUS: finishes processing materials made in the E.R. • VACUOLES: store water, waste & food. Large in plants, smaller in animal cells. • LYSOSOMES: small vacuole that holds digestive chemicals to break down materials in cell(food) or old cell parts. Identify the cell parts by placing the letter next to the correct organelle. H G E A B B D B F C J I _____ Cell Membrane _____ Cell Wall _____ Chloroplast _____ Central Vacuole _____ Nucleus _____ Endoplasmic Reticulum _____ Ribosome _____ Golgi Apparatus _____ Mitochondria _____ Cytoplasm
