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Chapter 3: Cells Part I: Differentiated Cells, Composite Cells, Cell Membrane
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Cells Adult human body has __________ ______varieties of cells Cells are considered to be “_________” – different _________ and ____________
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Cells vary in size and shape Red Blood Cell (RBC) 7.5 μm 1 micrometer (1μm) = 1 x10 -6 m) Human Egg Cell (Ovum) 140 μm Smooth Muscle Cell 20-500 μm long Nerve Cell Can be many cm in length White Blood Cell 10-12 μm
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Composite Cell Generic Cell Three major parts 1. 2. 3.
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Fig. 3.3
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Cell Membrane Surrounds the outside of the cell 1. 2. Many functions 1. 2.
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Cell Membrane Structure Phospholipids –Hydrophilic heads- “water” exposed to –Hydrophobic tails- “oil” lipid soluble substances –Ex. water soluble substances –Ex:
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Fig. 3.6
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Cholesterol 1. 2. Cell Membrane Structure
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Fig. 3.7
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Cell Membrane Structure Proteins 1.Receptor proteins- 2. Integral proteins-
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Fig. 3.7
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Cell Membrane Structure Proteins 3. Enzymes- 4. Cellular Adhesion Molecules (CAMS)- 5. Cell Surface Proteins -
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Fig. 3.7
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Intercellular Junctions Individual cells vs. groups of cells Permanently connect cell membranes of groups of cells 1. 2. 3.
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Clinical App. 3.1: Faulty Ion Channels Ion channels 1. 2. 3. Cystic Fibrosis and Cl - Channels 1. Abnormal 2. Thick mucous A. B. C. 3. Treatment:
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