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13 Cards in this Set
- Front
- Back
What is
made of a phospholipid bilayer protects the cell's organelles is a barrier that allows certain molecules in and out of the cell? |
The cell membrane
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What process is demonstrated when air freshener molecules are spread throughout the room?
( Remember Demonstration) |
Diffusion
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Why does the cell membrane represent a fluid mosaic model?
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because phospholipids float and slide past each other
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What is...
Movement of molecules from low to high concentration includes diffusion and osmosis? requires no energy |
Passive transport
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Describe the structure of a cell membrane
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a double layer of phospholipids with phosphate groups facing outward and fatty acid tails facing each other.
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If 25 gas molecules are clumped toward the left side of a box, they are considered to have a(n)__________
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concentration
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These molecules want to move until they establish a(n)
__________. |
equilibrium
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Which are nonpermeable to the cell membrane?
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ions
polar molecules large molecules |
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Which are permeable to the cell membrane?
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water
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Finish the sentence:
Water diffuises a cell membrane |
...in osmosis
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What happens once molecules reach equilibrium
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they continue to move but there is no net movement
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In what environment would a cell be in homeostasis?
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Isotonic
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In a hypertonic solution, the cell is in an environment with
_______________. |
less water and more solute than the cell.
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