Honors Bio: Movement Through Membranes

Gasses like Carbon Dioxide & Oxygen move from the lungs to the blood through the process of:

• active transport

• facilitated diffusion

• osmosis

• simple diffusion

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NGSS.HS-LS2-3

Where is there a low concentration of dye?

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

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NGSS.MS-PS1-2

What is diffusion?

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

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NGSS.MS-PS1-4

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)
  

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NGSS.MS-LS1-2

_______ regulates what enters and leaves a cell.  

• Cell Membrane
• Nucleus
• Mitochondria
• Cytoplasm

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NGSS.MS-LS1-2

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

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NGSS.MS-LS1-2

Diffusion & Facilitated Diffusion are both __________ transport.

• Passive

• Active

• Easy

• Free

• Passive Transport
• Active Transport

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NGSS.MS-LS1-2

What type of transport requires energy? 

• Active Transport
• Facilitated Diffusion
• Simple Diffusion
• Passive Transport

You put a cell into a solution, the cell grows. Is the solution hypotonic or hypertonic to the cell? 

• hypertonic
• hypotonic
• isotonic
• not enough information

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NGSS.MS-LS1-5