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Osmosis and diffusion

Osmosis and diffusion. By Chonell Peralta a nd Rosa Parra. What is osmosis and diffusion?. Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.

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Osmosis and diffusion

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  1. Osmosis and diffusion By Chonell Peralta and Rosa Parra

  2. What is osmosis and diffusion? • Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration. • Osmosis is the movement of water across a membrane in response to a solute concentration gradient.

  3. Why is osmosis and diffusion important? • Adults have approx. 60% water • 42 L • Intracellular fluid =28L • Interstitial fluid = 11 L • Plasma = 3L • Water is the solvent for all living matter

  4. Tonicity • Tonicity pertains to a solution and how it affects cell volume • Hypertonic = solution makes cell shrink • Hypotonic = solution makes cell swell • Isotonic = cell does not change (optimal solution)

  5. Surface Area to Volume ratio • Efficiency of a cell is based on its size

  6. rate of diffusion • Nonpolar molecules diffuse rapidly • Ions use protein channels • Polar molecules use facilitated diffusion

  7. Passive transport • No energy is used for osmosis to occur • Osmosis occurs by facilitated diffusion • Protein channel is needed for diffusion to take place • Aquaporins are used to diffuse water in and out of the cell

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