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8 Cards in this Set
- Front
- Back
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diffusion |
tendency for small particles or molecules to spread from an area of higher concentration to one of lower concentration. A result of the constant random movements of particles which eventually become evenly distributed throughout the available space. |
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plasma membrane |
a very selective barrier that allows certain molecules to cross it. Controls diffusion of molecules. |
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selective permeability |
A selectively permeable cell membrane is one that allows certain molecules or ions to pass through it by means of active or passive transport |
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osmosis |
a special case of diffusion; the diffusion of water across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration. |
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magnification of drawing = |
size of drawing / actual size of specimen |
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amyloplasts |
areas of starch granule storage in potato cells. |
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turgid |
Central vacuole is filled with water via diffusion (osmosis) thus giving internal pressure and allowing for cell rigidity. |
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hypertonic |
when a cell is placed in a concentrated aqueous solution that has a high concentration of solute. |
