Osmosis & Diffusion

What is diffusion?

• when molecules move 
• when molecules move from a high concentration to a low.
• no movement 
• molecules move everywhere

molecules move from a 

• high concentarion to low concentartion
• up and down
• left to right
• no movement

Where is there a high concentration of water?

• in the flower
• cannot be determined by picture.
• in the vase
• in the leaves

when a person smells something, what is actually traveing up their nose?

• solids 
• moleulces 
• matter
• plasma 

Where is there a low concentration of dye?

• at the bottom of cup
• in the color
• at the top of cup 
• no concenteraion gradient

Where is there a low concentration of perfume?

• in the bottle
• on the hand
• in the room
• in the top

Osmosis it the diffusion of __________.

• water
• glucose
• air
• passive transport

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

The picture below is an example of _________________.

• osmosis
• isotonic
• diffusion
• active transport