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CELL TRANSPORT CONT

Discover how molecules move across the cell membrane without energy through osmosis and facilitated diffusion. Learn about hypertonic, hypotonic, and isotonic solutions affecting cell size.

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CELL TRANSPORT CONT

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  1. CELL TRANSPORT CONT pp. 97-102

  2. Passive transport: Movement across the cell membrane without energy

  3. Osmosis: special diffusion of water (polar) across membrane • A solution is made of a solute dissolved in a solvent (like water). • Direction of movement is dependent on solutes outside cell. • Water moves towards the greatest number of solutes or towards the highest concentration

  4. Hypertonic: CONC of solutes is higher outside the cell and water moves out the cell- cell shrinks

  5. Hypotonic: CONC of solutes is lower outside the cell and water moves into the cell cell swells

  6. Isotonic:CONC of solutes inside = outside; so no net water movement

  7. Facilitated Diffusion: molecules too big to move across the membrane use carrier proteins EX. Glucose

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