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4-cellsoutl - membrane& pores 2 endoplasmic reticulum(ER...

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Biol 3 Lecture: Organization of the Cell (Ch 4) © copyright 2011 Marta D. de Jesus I. Cells are usually too small to see A. measurements 1. use micrometers = microns (μm) 2. use nanometers (nm) B. microscopes 1. light microscope a. some of the kinds 1) brightfield 2) darkfield 3) contrast 4) fluorescent 5) confocal b. limitations: 2. electron microscopes a. kinds: 1) transmission electron (TEM) 2) scanning electron (SEM) b. images c. limitations: 3. newer: scanning probe (Note: section on cell fractionation - we’ll do in BIOL V04) II. Cell Types: 2 basic kinds : A. prokaryotic 1. name 2. body plan a. cell membrane b. cytoplasm with 70S ribosomes c. nuclear area/nucleoid
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d. extra folded membrane e. flagellum f. fimbriae g. cell wall slime or capsule 4. relative size 5. 3 common shapes B. eukaryotic organelles 1. nucleus (found by Acetabularia grafting experiments -read!) chromosomes
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Unformatted text preview: membrane & pores 2. endoplasmic reticulum (ER) a. rough ER “free” 80S ribosomes b. smooth ER 3. Golgi complex/apparatus/body 4. vesicles & vacuoles a. food vacuole b. contractile vacuole c. plant central vacuole 5. lysosome 6. peroxisome 7. mitochondrion apoptosis 8. chloroplast plastids Side-track : symbiosis Endosymbiotic theory (Lynn Margulis) 1. Why do we think they were once separate organisms? 2. Was this recent? 9. cytoskeleton a. microtubules b. microfilaments c. intermediate filaments 10. centrioles centrosome 11. cilia & flagella “9 + 2” arrangement 12. plasma membrane 13. Outside the cell a. cell walls 1) prokaryotes 2) eukaryotes (i) chitin (ii) cellulose b. animal extracellular matrix (ECM) Cool cell video (animal cell; very dynamic) http://multimedia.mcb.harvard.edu/media.html...
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