02Cytology - CYTOLOGY Inner Life of the Cell Learning Goals...

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CYTOLOGY Inner Life of the Cell
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Learning Goals You should be able to. . . Explain compartmentalization. Identify the organelles of a cell. Define how organelles work together.
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I. Compartmentalization is required for specialization How do cells compartmentalize functions?
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Lipid bilayers are a selective barrier
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Excluded solutes must be transported across the membrane Can cells concentrate solutes? [A] [A] [B] [C] [B] [C] [D] [D]
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II. Cellular organelles What are the organelles found in cells? •What is an organelle? •Are all organelles membrane bound? •What structures are not membrane bound? •What organelles have more than one bilayer? •Are organelles attached? •How do organelles interact?
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The Nucleus
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Nucleus Nucleus Nucleolus Chromatin Nuclear envelope: Inner membrane Outer membrane Nuclear pore Rough ER Pore complex Surface of nuclear envelope. . Close-up of nuclear envelope Ribosome 1 µm 1 µm 0.25 µm The Nucleus
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Ribosomes Ribosomes ER Cytosol Endoplasmic reticulum (ER) Free ribosomes Bound ribosomes Large subunit Small subunit TEM showing ER and ribosomes Diagram of a ribosome 0.5 µm
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Endoplasmic Reticulum (ER) -Continuous with the nuclear envelope -Smooth and Rough
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Smooth & Rough ER
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The Golgi Apparatus Golgi apparatus cis face (“receiving” side of Golgi apparatus) Vesicles move from ER to Golgi Vesicles also transport certain proteins back to ER Vesicles coalesce to form new cis Golgi cisternae Cisternal maturation: Golgi cisternae move in a cis - to- trans direction Vesicles form and leave Golgi, carrying specific proteins to other locations or to the plasma mem-
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This note was uploaded on 05/09/2008 for the course PDBIO 325 taught by Professor Reynolds during the Winter '08 term at BYU - ID.

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02Cytology - CYTOLOGY Inner Life of the Cell Learning Goals...

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