Osmosis and Diffusion

Osmosis and Diffusion

Multiple Choice

What organelle is considered to be the “gatekeeper” for plant and animal cells?

• Cell Wall
• Cytoplasm
• Nucleous
• Cell Membrane

Multiple Choice

This organelle controls what goes in and out of plant and animal cells.

• Cell Wall

• Cell Membrane

• Chloroplasts

• Cytoplasm

Multiple Choice

Permeable means

• things can pass through
• the concentration levels are different
• it is permanent
• things are stuck

Multiple Choice

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)
  

Multiple Choice

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

Multiple Choice

_______ regulates what enters and leaves a cell.  

• Cell Membrane
• Nucleus
• Mitochondria
• Cytoplasm

Multiple Choice

Where is there a low concentration of perfume?

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

Multiple Choice

Where is there a low concentration of dye?

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

Multiple Choice

The picture below is an example of _________________.

• osmosis
• isotonic
• diffusion
• active transport

Multiple Choice

What is diffusion?

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

Multiple Choice

What is the definition of Osmosis?

• the movement of WATER molecules across the cell membrane.
  
• the state where molecules are equally concentrated (balanced) on both sides of the cell membrane.
  
• the process that brings LARGE particles INTO the cell through the cell membrane
  
• he movement of molecules across the cell membrane that REQUIRES ENERGY output from the cell
  

Multiple Choice

Where is there a high concentration of bbq smoke?

• In the bbq pit
• In the house
• Two streets over
• In the atmosphere

Multiple Choice

Where is there a high concentration of water?

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

Multiple Choice

What is DIFFUSION?

Multiple Choice

During osmosis

• water moves from high to low concentration
• large or oddly shaped molecules move across a cell membrane
• water moves when energy is used
• proteins are built

Multiple Choice

Osmosis is the movement of _____ across a membrane.

• food
• energy
• oxygen
• water