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ECU BIOL 2130 - Exam 1 Study Guide

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BIO 2130 Exam # 1 Study Guide Study Guide (September 10)Introduction to Diffusion and OsmosisDiffusion:• b/c molecules in a solution move continuosly and collide with other molecules  cause to move away from areas with highest [ ] to low-There are 3 types of diffusion• Simple• Facilitated• Osmosis• Simple: high to low solute [ ]…unassisted…non-polar• Facilitated: too large to pass via…solution?  bind to protein carrier & moves via water-filled protein channels…assisted• Osmosis: solvent/water…occurs when water [ ] diff on the 2 sides of membrane…solute [] increase, water [ ] decrease and vice versa…water will move from high water [ ] (low solute) to low water [ ] (high solute) • Isotonic• Hypertonic• Cells lose water, shrink• Solution w/ higher [ ] solutes outside cell• Hypotonic• Cells take on water until they burst• Solution w/ higher [ ] solute inside


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ECU BIOL 2130 - Exam 1 Study Guide

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