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Osmosis. Water Concentrations Movement of water molecules (H20) across a permeable membrane. Molecules move from area of high concentrations to areas of low concentrations. Aims to equalize concentration inside and outside the cell. 3 Osmosis Situations Isotonic Hypotonic Hypertonic.

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osmosis1

Water Concentrations

  • Movement of water molecules (H20) across a permeable membrane.
  • Molecules move from area of high concentrations to areas of low concentrations.
  • Aims to equalize concentration inside and outside the cell.
  • 3 Osmosis Situations
    • Isotonic
    • Hypotonic
    • Hypertonic
Osmosis
isotonic

Iso-equal

  • EQUAL amounts of water inside and outside the cell.
Isotonic
hypotonic solutions

Hypotonic more H20 molecules Outside the cell

  • Hypo-below, under, less
  • H20 molecules will move IN to the cell.
  • Cell takes on water
Hypotonic Solutions
hypertonic solutions

more H20 inside cell/less H20 molecules outside cell.

  • Hyper-above, excessive
  • Cell loses H20 molecules.
  • Cell dehydrates
Hypertonic Solutions