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Lab

Lab. What happened in the water? Why? What type of solution and transport occurred? What happened in the colored water? Why? What type of solution and transport occurred? What happened in the vinegar? Why? What type of solution and transport occurred?

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Lab

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  1. Lab • What happened in the water? Why? What type of solution and transport occurred? • What happened in the colored water? Why? What type of solution and transport occurred? • What happened in the vinegar? Why? What type of solution and transport occurred? • What happened in the corn syrup? Why? What type of solution and transport occurred?

  2. Moving “things” In and Out of the Cell Actively!!

  3. Proteins in the Hizouse!!

  4. Active Transport • Requires energy • Moving large molecules • Pumps • Moving ions against their concentration gradients • Low to high • Very common for Potassium (K+) and Sodium (Na+)

  5. What about the large molecules?

  6. Endocytosis vs. Exocytosis • Cells need a way to take in and get rid of large molecule or particles that cannot pass through the membrane • Endo - Cell membrane extends out around the particle to take it in • Exo – Vesicles meet the cell membrane to discharge materials; get them out

  7. 3 Types of Endocytosis • Phagocytosis • Food • Pinocytosis • Liquid • Receptor-Mediated Endocytosis • Uses the Receptor Proteins • Specific molecules only!

  8. Endocytosis • All three types form vesicles which carry the materials into the cell

  9. Exocytosis • Getting materials out of the cell

  10. Let’s watch both processes! http://highered.mcgraw-hill.com/olc/dl/120068/bio02.swf

  11. Proteins’ Jobs • Carrier Proteins • Passive Transport • Move materials (glucose) with concentration gradient • Pumps • Active Transport • Move ions against their concentration gradient

  12. Receptor Proteins • Active Transport • Receptor-Mediated Endocytosis • Marker Proteins (the one not in active or passive transport) • Help cells communicate • Recognition of cells

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