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Transport

Transport . By Sadia Noori . Definition . Extracellular fluid- the stability of cells fluid located outside cell membranes includes, blood plasma and interstitial fluid.

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Transport

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  1. Transport By Sadia Noori

  2. Definition • Extracellular fluid- the stability of cells fluid located outside cell membranes includes, blood plasma and interstitial fluid. • Plasma membrane-a delicate bilayer of phosphide molecules enclosing the cytoplasm in all cells. It controls the movement of substance, into and out of the cell and is responsible for recognition, adhesion and chemical communication between cells. • Diffusion- passive movement of a solute from a region of high concentration to a region of lower concentration. • Osmosis- passive diffusion of free water molecules across a semi-permeable membrane from a solution in which there are more free water molecules (a dilute solution) to a solution in which there are less free water molecules ( a more concentrated solution) • semi permeable membrane- is permeable to water and some other very small molecules, but blocks the passage of solutes such as sugars and salts. • Facilitated diffusion- passive movement across a membrane through a protein carriers, which makes the movement faster than it would be along the concentration gradient only. • Active transport- Movement of substance across membrane that requires the expenditure if energy. • Endocytosis + Exocytosis-taking external material into a cell by enclosing it in plasma membrane, which pinches off to form a vesicle within the cell, includes phagocytosis (energy of solids) and pinocytosis (entry of liquid ) Exocytosis- release of substance enclosed within a vesicles to the plasma membrane expelling the vesicle’s contents.

  3. Pictures • Extracellular fluid Plasma membrane-

  4. Diffusion Osmosis

  5. Osmosis Facilitated Diffusion-

  6. Facilitated diffusion Active transport

  7. Endocytosis + Exocytosis

  8. Videos • Extracellular fluid http://www.videosurf.com/video/learnursing-com-hot-shots-free-video-clips-fluid-electrolytes-95703580 • Plasma membrane http://www.youtube.com/watch?v=mtDm2OKIK1k • Diffusion http://www.youtube.com/watch?v=aNLU7QIbdzs&feature=related • Osmosis http://www.youtube.com/watch?v=VVORi8Bqlss&feature=related • semi permeable membrane http://www.youtube.com/watch?v=2Th0PuORsWY

  9. Facilitated diffusion http://www.youtube.com/watch?v=LOJdScXKsUY • Active transport http://www.youtube.com/watch?v=STzOiRqzzL4 • Endocytosis http://www.youtube.com/watch?v=4gLtk8Yc1Zc • Exocytosis http://www.youtube.com/watch?v=K7yku3sa4Y8

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