Part 4 Cells
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Created by:
Rsteilberg on November 30, 2010
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Part 4 cells, Mrs. Campfield
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21 terms
Terms | Definitions |
|---|---|
 fluid mosaic | Proteins interspersed, made up of phospholipids and proteins in small pieces, molecules move in relation to eachother |
| hydrophilic end | phosphate head |
| hydrophobic end | lipid tail |
| cell surface marker proteins | identifies the cell, helps immune system identify itself from foreign cells |
| protein channel | passageway in the cell membrane to allow ions and other certain cell materials to enter and leave the cell |
| passive transport | transport that does not require cellular energy (ATP), but utilizes energy from molecules; goes with the flow of the concentration gradient |
| semipermeable membrane | membrane that allows some molecules to pass through while prohibiting others |
| diffusion | the movement of molecules from an area of higher concentration to an area of lower concentration |
| concentration gradient | difference in concentrations going from higher to lower |
| osmosis | diffusion of water across a selectively permeable membrane |
| absolute zero | when there is absolutely no cell movement or energy |
| hypertonic | a solution that has a greater concentration of solutes than the solution to which it is being compared |
| hypotonic | a solution that has a lesser concentration of solutes than the solution to which it is being compared |
| isotonic | a solution that has the same concentration of solutes than the solution to which it is being compared |
| facilitated diffusion | the process by which a cell utilizes special protein channels to help molecules pass through the membrane easiet |
| active transport | transport that requires cell energy (ATP) and goes AGAINST the concentration gradient (from high concentration to low concentration) |
| bulk transport | the movement of large amounts of large materials into the cell |
| exocytosis | when materials are forced out of the cell (surrounding membrane of the material fuses with the cell membrane and forces the material out of the cell) [form of bulk transport] |
| endocytosis | the import of materials into the cell by the infoldings of the plasma membrane [form of bulk transport] |
| pinocytosis | form on endocytosis when the cell takes in liquids (cell drinking) |
| phagocytosis | form of endocytosis when psuedopods form around the molecule to form a vesicle for intake into the cell (cell eating) |
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