CH 3 CELLS (STRUCTURE) CYTOLOGY(brief)

CH 3 CELLS (STRUCTURE) CYTOLOGY(brief) - CYTOLOGY THE STUDY...

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CYTOLOGY THE STUDY OF CELLS - STRUCTURE
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GENERAL Cell = Smallest Living Unit Produced by Cell Division or Fertilization Surrounded by Interstitial / Extracellular Fluid Components: - Plasma (Cell) Membrane - Cytoplasm - Nucleus
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THE PLASMA MEMBRANE Structure - Phospholipid bilayer * self-orienting, reseals * hydrophilic heads (face outward) * hydrophobic tails (face inward) - Proteins (floating or anchored) - Cholesterol (keeps it “fluid”)
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THE PLASMA MEMBRANE Functions: - Physical Barrier (Selective!) * Fat-soluble do pass through * Water-soluble don’t - Proteins: * Channels or Carriers (transport) * Enzymes (chemical reactions) * Receptor sites (“docking” of molecules) * Anchors
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THE PLASMA MEMBRANE
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CYTOPLASM Material Between Plasma Components * Cytosol (fluid with solutes) * Cytoplasmic Organelles * Inclusions (stored materials) Site of chemical reactions
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NUCLEUS Organelle Double Nuclear Membrane with Pores DNA – Instructions for making proteins
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CH 3 CELLS (STRUCTURE) CYTOLOGY(brief) - CYTOLOGY THE STUDY...

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