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18 Cards in this Set
- Front
- Back
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what are the three basic structures of cells? |
plasma membrane, cytoplasm containing organelles, nucleus |
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what is the basic unit of life? |
cell |
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functions of cells? |
protection and support, movement, communication, inheritance |
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can form channels through the membrane |
integral |
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attatched to integral proteins at either the inner or outer surfaces of the lipid bilayer |
peripheral |
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hydrophilic region faces inward; changes determines molecules that can pass through; integral |
channel proteins |
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always open channel proteins |
nongated ion channels |
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channel proteins that can be open or closed |
gated ion channels |
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movement of solutes from an area of higher concentration to lower concentration in solution |
diffusion |
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diffusion of water across a selectively permeable membran |
osmosis |
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cell neither shrinks nor swells |
isotonic |
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cell shrinks
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hypotonic
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cell swells |
hypertonic |
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movement of solutes that requires energy (ATP) |
active transport |
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taking in a solid substance |
phagocytosis |
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taking in a liquid |
pinocytosis |
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process that gets rid of unneeded stuff |
exocytosis |
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internalization of substances by formation of a vesicle |
endocytosis |
