Osmosis Quiz

How do molecules move during diffusion?

• From high concentration to low concentration

• From low concentration to high concentration

What is the goal of diffusion called when molecules are equally spread out?

• Samenss

• Equilibrium

True or False: In simple diffusion, molecules move from high concentration to low concentration across a membrane.

• True

• False

Which type of diffusion uses a protein to help molecules get across?

• Simple diffusion

• Facilitated diffusion

Phospholipids have a -

• nonpolar head and a nonpolar tail.

• polar head and a polar tail.

• nonpolar head and a polar tail.

• polar head and a nonpolar tail.

Match the following scenario with the correct solution tonicity.

• hypertonic solution

• The cell gains water, swells, and lyses

• isotonic solution

• The cell remains in homeostasis

• hypotonic solution

• The cell loses water and shrivels

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 is the movement of _____ across a membrane.

• food
• energy
• oxygen
• water

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

Which way will the water molecules move during osmosis?

• Out of the cell, so the cell shrinks.
• Out of the cell, so the cell swells.
• Into the cell, so the cell shrinks.
• Into the cell, so the cell swells.