Bio cellular transport

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Review of Cellular Transport

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Bio cellular transport

  1. 1. Cellular Transport<br />An Overview<br />
  2. 2. How does the polarity of water make hydrogen bonding possible?<br />Water is a polar molecule<br />slightly positive end (H) and slightly negative end (O) because electrons spend more time in orbit around larger O molecule<br />H’s of one water molecule are attracted to O’s of another<br />Form Hydrogen bonds<br />H-bonds are usually weak, but are unusually strong in water<br />Gives water several important properties<br />
  3. 3. Hydrogen Bonding<br />http://www.classzone.com/cz/books/bio_09/resources/htmls/animated_biology/unit1/bio_ch02_0041_ab_bonding.html<br />
  4. 4. How are the 3 properties important in cells and organisms?<br />3 important properties:<br />Cohesion<br />Water molecules stick together<br />Surface tension, blood<br />Adhesion<br />Water molecules stick to other things<br />Capillary action<br />High Specific Heat<br />Water resists changes in temperature<br />Chemical reactions produce a lot of heat<br />Maintains homeostasis<br />
  5. 5. What is blood?<br />Liquid part is called plasma<br />About 95% water<br />Also includes red blood cells, white blood cells, platelets, sugars, proteins, etc.<br />
  6. 6. Water as a Solvent<br />Water is an excellent solvent, but not the “universal solvent” as commonly called<br />Water readily dissolves polar substances and ionic compounds<br />Sugars, proteins, salts<br />Water does not dissolve nonpolar substances<br />Fats, oils<br />
  7. 7. Double Layer of Phospholipids<br />
  8. 8. Other components of the Cell Membrane<br />Proteins<br />Aid in transport of materials in and out of cell<br />Anchor cell membrane to cytoskeleton<br />Carbohydrate chains<br />Identify cells<br />Cholesterol<br />Strengthen membrane<br />
  9. 9. How is the cell membrane like a window screen?<br />Selective Permeability<br />It allows some molecules to pass through it but not others<br />Some molecules need an opening, like a transport protein<br />
  10. 10. Cellular Transport<br />Two types<br />Passive transport<br />Particles move from higher concentration to lower concentration, requires no cellular energy<br />Diffusion, facilitated diffusion, osmosis<br />Active Transport<br />Particles move from lower concentration to higher concentration, requires cellular energy<br />Pumps, endocytosis, exocytosis<br />
  11. 11. Passive Transport<br />
  12. 12. Passive Transport: Osmosis<br />Tonicity Animation<br />
  13. 13. Active Transport<br />Active Transport<br />Passive Transport<br />
  14. 14. Active transport in the body<br />Sodium-Potassium Pumps<br />Help your nerve cells to function<br />Pump sodium ions out of and potassium ions into cell<br />Endocytosis<br />Cell eating and drinking (single-celled organisms)<br />Exocytosis<br />Cell secretions, waste disposal<br />
  15. 15. Endo/Exocytosis<br />
  16. 16. Cellular Transport Review<br />http://www.classzone.com/cz/books/bio_09/resources/htmls/animated_biology/unit2/bio_ch03_0093_ab_cellmem.html<br />

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