Osmosis

• Osmosis is the n__ movement of water molecules across a ______  permeable membrane, from a region of ____ water concentration, to a region of ____ water concentration.

  net

  partially

  higher

  lower
• True or false? Osmosis is a special form of diffusion.

  True
• In living organisms, the partially permeable membrane is usually the ___________

  Cell membrane
• Osmosis is the movement of which molecules?

  Water
• True or false? During osmosis, water moves against the concentration gradient. 

  False - water moves down the concentration gradient (from high to low), not against it (from low to high).
• What would happen to red blood cells if they were placed in pure water?

  They would gain water and swell

  If placed in pure water, then the water concentration would be higher outside the cell (in the pure water) than inside the cell. This means that water would move down its concentration gradient into the cell, causing it to swell and possibly burst.