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cell structure tay2
| Question | Answer |
|---|---|
| cell membrane | the cells are surronded by a thin barrier |
| cell wall | many cells also produce a strong supporting layer around membrane |
| lipid bilayer | the composition of nearly all cell membranes is a double layered gives cell membranes a flexibe ctructure that forms a strong barrier between cell and its surrondings |
| concentration | of a solution is the mass of soulte in a given volume of solution, mass/volume, |
| diffusion | the particels that tend to move from an area where they are more concentrated to an area where they are less concentrated |
| equilibrium | when ther concetration of the soulte is the same throughout a system |
| osmosis | is the diffusion of water through a selectivley premeable membrane |
| isotonic | when the concentration will be the same on both sides of the membrane |
| hypertonic | above strenght |
| hypotonic | below strenght |
| facilitated diffusion | during facilitated diffusion molecules, such as glucose, that cannot diffue across the cell membranes lipid bilayer on their own move through portein channels instead |
| active transport | the active transport of small molecules or ions across a cell membrane is generally carried out by transport porteins that are found in the membrane itself |
| endocytosis | `is the process of taking material into the cell by means of infoldings of the cell membrane |
| phagocytosis | extensions of cytoplasms surronded a particle and package it within a food vacuole |
| pincyotosis | extensions of cytoplasms surrond a paricule and package it within a food vacuole |
| exocytosis | the membrane of the vacuole surronding the material fuses with the cell membrane |
| cell specialization | cell throughout an organism can devlop in diffrent ways to perform diffrent tasks |
| tissue | a group of similar cells that prouduce a paticular function |
| organ | many groups of tissues work together as an organ |
| organ system | a group of organs that work toghter to perform a specific function |