BIO 12 UNIT 2: Study Notes

TRANSPORT ACROSS CELL MEMBRANE

HYPERTONIC, HYPOTONIC, ISOTONIC 

• HYPERTONIC
• H2O molecules move from an area of high [H2O] in the cell to a low [H2O] outside the cell {water moving out of cell}
• Results in "Crenation" (Shriveling/shrinking of cell)

• HYPOTONIC 
• H2O molecules move from an area of high [H2O] outside cell to a low [H2O] inside the cell {water moving into the cell}
• Results in "Lysis" (Swelling/bursting of cell)

• ISOTONIC
• H2O molecules at equal rates into/out of cell 
• Results in equilibrium (even amount of H2O molecules inside and outside cell)