8.3 Diffusion and Osmosis

Osmosis is a form of ______________.

• Passive Transport because it does not require energy.

• Active Transport because it requires energy.

A cell will __________________ in a hypotonic solution.

• swell and perhaps burst (lyse)
• shrink
• the size of the cell will not change
• the size of the cell will change from large to small and from small to large

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An gummy bear placed in a hypertonic (salty) solution will

• Stay the same

• Shrink- get smaller

• Swell- get bigger

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The picture below is an example of _________________.

• osmosis
• isotonic
• diffusion
• active transport

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Osmosis is the movement of _____ across a membrane.

• food
• energy
• oxygen
• water

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What does “high concentration area” mean?

• Spread out
• Tightly packed together
• Uncrowded
• Spacious

When both inside and outside of a cell have the same amount of water it is said that the cell has reached a state of ___________.

• osmosis
• equilibrium
• diffusion
• hypertonic

The cell is 99% water. The surrounding is salty. Where will the water go?

• Into the cell
• Out of the cell
• Equally in & out 

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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

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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