Cell Transport Review

Osmosis is what type of transport?

• Active

• Passive

Osmosis needs _____ energy.

• zero

• a lot of

• 10 kilowatts

• some

Osmosis is the movement of

• water from high concentration to low concentration

• water from low concentration to high concentration

• sugar from high concentration to low concentration

• sugar from low concentration to high concentration

_____ is the amount of a given substance contained in a solution

• concentration

• equilibrium

• diffusion

• facilitated diffusion

If the dots represent sugar which is more concentrated

• Inside the cell

• Outside the cell

• Neither they are equal (equilibrium)

If the dots represent sugar, what direction will water flow?

• Into the cell

• Out of the cell

• Into and out equally (equilibrium)

If the percentage represents sugar, what direction will water flow?

• Into the cell

• Out of the cell

• Into and out equally (equilibrium)

What is the definition of  Selective Permeability?

• The movement of materials across the cell membrane that requires NO ENERGY from the cell.
  
• The movement of materials through (or across) the cell membrane
  
• The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.
• The movement of molecules from an area of high concentration (where the molecules are more crowded together) to a area of low concentration (where molecules are more spread apart)
  

Osmosis

• diffusion of water molecules through a semi-permeable mebrane from an area of low concentration to an area of high concentration
• the diffusion of particles from an area of high concentration to an area of low concentration
• diffusion of water molecules through a semi-permeable membrane from an area of high concentration to an area of low concentration
• the diffusion of particles from an area of low concentration to an area of high concentration

Equilibrium?

• a large  amount of substance on  side of the cell and a small amount on the other side
• a small  amount of substance on  side of the cell and a large amount on the otherside
• equal amount of substance on either side of the membrane  
• no particles on either side of the a cell membrane