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Biological Membranes

Biological Membranes. Membranes. Membrane Proteins. Transport Channels Pumps E- Transfer Recognition Antigens, glycoproteins. Membrane Proteins. Structural Proteins Attachment Receptors Signal Transduction Joining Proteins Enzymatic. Movement Across Membranes. Simple Diffusion

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Biological Membranes

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  1. Biological Membranes

  2. Membranes

  3. Membrane Proteins • Transport • Channels • Pumps • E- Transfer • Recognition • Antigens, glycoproteins

  4. Membrane Proteins • Structural Proteins • Attachment • Receptors • Signal Transduction • Joining Proteins • Enzymatic

  5. Movement Across Membranes • Simple Diffusion • Random Movement of Molecules • Passive transport • Concentration Gradients

  6. Movement Across Membranes • Osmosis • H2O only! • Solute Gradient • Hypertonic • Hypotonic • Isotonic

  7. Osmosis & Cells

  8. Movement Across Membranes • Facilitated Diffusion • Random Movement of Molecules • Passive transport • Concentration Gradients • Channel Proteins

  9. Movement Across Membranes • Active Transport • Energy is required … ATP • Transport Proteins (pumps) • Movement AGAINST a concentration gradient.

  10. Sodium-Potassium Pump

  11. Short Homework: • How does “Cotransport” work & where in the body would you find such a phenomenon? • Be sure site your source(s)

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