osmosis

• what is the definition of osmosis

  Osmosis is the movement of water molecules from a higher water concentration to a lower water concentration, through a selectively permeable membrane.
• what is meant by osmosis being passive

  it doesn't require ATP
• what is water potential measured in

  kpa
• what is the water potential of pure water

  0 kPa
• what happends to the water potential of a solution when a solute is added to it

  it will decrease and become more negative
• what is the relationship between concentration and water potential

  the higher the concentration of solutes the more negative the water potential
• Describe a hypertonic solution

  the external solution to the cell will be more negative then the solution inside the cell
• Describe a hypotonic solution

  the external solution to teh cell will be less negative then the solution in the cell
• Describe a isotonic solution

  bitch the cell and solution are equal in concentration
• if the external solution is hypotonic to the cell which way will the water flow


  into the cell
• if the external solution is hypertonic to the cell which way will the water flow


  out of the cell
• what is the definition of solute potential

  the concentration of dissolved substances
• what is the definition of pressure potential

  this is the pressure caused by the plant cell filling with water and pushing against the cell wall
• what will the plant cell become if the water causes it too swell

  turgid
• what is meant by plasmolysed

  this is when the cell membrane shrinks and the cell wall doesn't change
• what is meant by incipient plasmolysis

  this is when 50 percent of the cells in a solution are plasmolised
• what will a higher solute potential do to the water potential


  it will lower it
• what is the formula for water potential of the cell

  pressure potential + solute potential
• if the water potential of cell x is equal to -800 and the water potential of cell y is equal to -1000 which way will the water move and why

  from x to y , as water will move from high to low areas of water potential