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II . Active transport

This informative video explains the various active transport mechanisms, including ion pumps and movement of charged particles such as Na+, K+, and Ca+2. It also covers endocytosis and exocytosis processes in cells, as well as the role of carbohydrates and cholesterol in maintaining fluidity of the cell membrane.

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II . Active transport

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  1. II. Active transport • Requires cellular E from mitochondria • Particles are pushed/forced across the cell membrane • Substances are charged or large

  2. A. Ion pumps • Movement of charged particles • Na+, K+,Ca+2 • Moving through special protein pumps • From an area of [LO] to [HI] AGAINST gradient

  3. Against the gradient

  4. Pumps: against the gradient K+ Ca+2 K+ Ca+2 Na+ K+ Ca+2 K+ Ca+2 Na+ Na+ K+ Ca+2 Na+ Active transport

  5. Na/K pump http://www.youtube.com/watch?v=_bmp2_T0c7k&feature=related http://www.youtube.com/watch?v=STzOiRqzzL4

  6. B.Endocytosis • Movement of manysmall particles (pinocytosis) • Food for ameba • Movement of large molecule (phagocytosis) • Bacteria by WBC • Enveloped by cell membranewhich becomes a vesicle

  7. C.Exocytosis • Movement of many or large cell products • lipids, enzymes, etc. • Vesicle moves to, merges with, becomes part of cell membrane

  8. Endocytosis/exocytosis • https://www.youtube.com/watch?v=DuDmvlbpjHQ http://www.youtube.com/watch?v=K7yku3sa4Y8&feature=related

  9. Endocytosis & exocytosis http://www.youtube.com/watch?v=4gLtk8Yc1Zc

  10. Endo/exocytosis Active transport

  11. endocytosis

  12. Exocytosis

  13. Cell membrane: Carbs • CARBS are important for cell identification

  14. Cholesterol to keep CM fluid

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