3-1<br />Anatomy and Physiology<br />Cells<br />
3-2<br />Chapter 3<br />Cell Structure and Function <br />
3-3<br />Cell Characteristics<br />Plasma Membrane<br />Outer cell boundary<br />Cytoplasm<br />Cytosol<br />Cytoskeleton<...
3-4<br />Functions of the Cell<br />Basic unit of life<br />Protection and support<br />Movement<br />Communication<br />C...
3-5<br />
3-6<br />Plasma Membrane<br />Intracellular versus extracellular<br />Membrane potential<br />Glycolipids and glycoprotein...
3-7<br />Membrane Lipids<br />Phospholipids form a lipid bilayer<br />Hydrophilic (water-loving) polar heads<br />Hydropho...
3-8<br />Membrane Proteins<br />Integral or intrinsic<br />Extend from one surface to the other<br />Peripheral or extrins...
3-9<br />Marker Molecules<br />Allow cells to identify on another or other molecules<br />Glycoproteins<br />Glycolipids<b...
3-10<br />Channel Proteins<br />Nongated ion channels<br />Always open<br />Ligand gated ion channel<br />Open in response...
3-11<br />Receptors<br />Receptor molecules<br />Exposed receptor site<br />Linked to channel proteins<br />Acetylcholine<...
3-12<br />Enzymes and Carrier Proteins<br />
3-13<br />Movement through the Plasma Membrane<br />Diffusion<br />Osmosis<br />Filtration<br />Mediated transport mechani...
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  1. 1. 3-1<br />Anatomy and Physiology<br />Cells<br />
  2. 2. 3-2<br />Chapter 3<br />Cell Structure and Function <br />
  3. 3. 3-3<br />Cell Characteristics<br />Plasma Membrane<br />Outer cell boundary<br />Cytoplasm<br />Cytosol<br />Cytoskeleton<br />Cytoplasmic inclusions<br />Organelles<br />Specialized structures that perform specific functions<br />
  4. 4. 3-4<br />Functions of the Cell<br />Basic unit of life<br />Protection and support<br />Movement<br />Communication<br />Cell metabolism and energy release<br />Inheritance<br />
  5. 5. 3-5<br />
  6. 6. 3-6<br />Plasma Membrane<br />Intracellular versus extracellular<br />Membrane potential<br />Glycolipids and glycoproteins<br />Fluid-mosaic model<br />
  7. 7. 3-7<br />Membrane Lipids<br />Phospholipids form a lipid bilayer<br />Hydrophilic (water-loving) polar heads<br />Hydrophobic (water-fearing) nonpolar heads<br />Cholesterol: Determines fluid nature of membrane<br />
  8. 8. 3-8<br />Membrane Proteins<br />Integral or intrinsic<br />Extend from one surface to the other<br />Peripheral or extrinsic<br />Attached to either the inner or outer surfaces of the lipid bilayer<br />
  9. 9. 3-9<br />Marker Molecules<br />Allow cells to identify on another or other molecules<br />Glycoproteins<br />Glycolipids<br />Examples:<br />Immune system<br />Recognition of oocyte by sperm cell<br />
  10. 10. 3-10<br />Channel Proteins<br />Nongated ion channels<br />Always open<br />Ligand gated ion channel<br />Open in response to small molecules that bind to proteins or glycoproteins<br />Voltage-gated ion channel<br />Open when there is a change in charge across the plasma membrane<br />
  11. 11. 3-11<br />Receptors<br />Receptor molecules<br />Exposed receptor site<br />Linked to channel proteins<br />Acetylcholine<br />Linked to G proteins<br />Alter activity on inner surface of plasma membrane<br />
  12. 12. 3-12<br />Enzymes and Carrier Proteins<br />
  13. 13. 3-13<br />Movement through the Plasma Membrane<br />Diffusion<br />Osmosis<br />Filtration<br />Mediated transport mechanisms<br />Facilitated diffusion<br />Active transport<br />Secondary active transport<br />

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