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Simple Diffusion

Simple Diffusion.

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Simple Diffusion

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  1. Simple Diffusion http://images.google.com/imgres?imgurl=http://www.esu7.org/~lweb/gifs/cells.jpg&imgrefurl=http://www.esu7.org/~lweb/Lakeview/science/sea.htm&usg=__WRoEbPFHEL_0_lRaf6ch87l7Vfg=&h=214&w=500&sz=15&hl=en&start=1&um=1&tbnid=HB_KYZJxlxHSHM:&tbnh=56&tbnw=130&prev=/images%3Fq%3Dred%2Bblood%2Bcells%2Bhypertonic%2Bsolution%26um%3D1%26hl%3Den%26sa%3DN

  2. Simple Diffusion

  3. Osmosis- movement of water towards high solute concentration

  4. Describe each solution relative to the RBC. http://ilovebacteria.com/Images/blood.jpg

  5. In A, how would you describe the solution the cells are in? And in B?

  6. Hypotonic solution Isotonic solution Hypertonic solution Animal cell (A) Normal (B) Lysed (C) Shriveled Plasma membrane Plant cell (F) Shriveled (D) Flaccid (E) Turgid (plasmolyzed)

  7. Active Transport • Move solutes against concentration gradient, [L][H] • Requires energy from ATP (adenosinetriphosphate) • Example, sodium potassium pump, K+ in and Na+ out

  8. Active Transport Transport protein Phosphate detaches Protein changes shape Solute Protein reversion Solute binding Phosphorylation Transport 4 1 2 3

  9. Transport of Large Molecules Across Membranes Cells rely on: • Exocytosis • Endocytosis a. phagocytosis b. pinocytosis c. receptor-mediated endocytosis

  10. Phagocytosis Food being ingested EXTRACELLULAR FLUID CYTOPLASM Pseudopodium “Food” or other particle Food vacuole

  11. Pinocytosis- material in droplet not regulated Pinocytosis Plasma membrane Vesicle Plasma membrane

  12. Plasma membrane Receptor-mediated endocytosis Coat protein Receptor Coated vesicle Coated pit Coated pit Specific molecule Material bound to receptor proteins *human cells use process to take in cholesterol from blood

  13. Phagocytosis Food being ingested EXTRACELLULAR FLUID CYTOPLASM Pseudopodium “Food” or other particle Food vacuole Pinocytosis Plasma membrane Vesicle Plasma membrane Receptor-mediated endocytosis Coat protein Receptor Coated vesicle Coated pit Coated pit Specific molecule Material bound to receptor proteins

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