4915234
Description
Flashcards by Jin Braicovic, updated more than 1 year ago
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Created by Jin Braicovic
about 8 years ago
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| Question | Answer |
| substances that move in | Oxygen water nutrients |
| Substances that move out | carbon dioxide wastes |
| hydrophilic | -face water environment -water liking |
| hydrophobic | -face each other -water repelling |
| phospholipid | lipid containing phosphate groups |
| fluid mosaic model of cell membrane | - Jonathan singer and garth nicholas in -protein molecules imbedded in lipid bilayer |
| functions of cell membrane structures: phospholipid Bilayer | acts as a barrier to ions |
| Embedded proteins | some help specific substances to cross membrane through protein pore |
| passive movement | expends no energy (diffusion and osmosis) |
| active movement | expends energy |
| diffusion | the movement of substances from a more concentrated to a less concentrated one |
| osmosis | diffusion of water across a semi-permeable membrane from an area where there is more water to an area where there is less. |
| concentration gradient | the difference in the number of particles compared to the number of particles in another area. |
| hypertonic (more) | more concentrated solution (more molecules outside) (sea water) |
| isotonic | same concentration |
| hypotonic | less concentrated solution (fresh water) |
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