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Unit 6
Part 2- cell membrane and transport
| Question | Answer |
|---|---|
| membrane proteins | proteins embedded in the membrane |
| phospholipid | a molecule composed of a charged phosphate group, glycerole molecule, and two fatty acid chains |
| phosholipid bilayer | two layers of of phospholipids where the the tails attract to each other and the heads attract to the water |
| fluid mosaic model | describes the arrangement of molecules in the cell membrane |
| cholesterol | |
| glycolipid | A glycogen molecule attached to a phospholipid |
| proteins | |
| intergral proteins | embeded in the bilayer |
| transmembrane proteins | proteins that span the width of a cell membrane and allow hydrophilic substances through |
| peripheral proteins | loosely bound to the membrane and do not go through it |
| receptor proteins | |
| transport proteins | a protein that spans the membrane and may allow some molecules into the cell through a passage |
| channel proteins | |
| aquaporins | channel proteins specific to water molecules |
| ion channels | |
| gated channels | protein channels with a "gated" entrance |
| carnir channels | |
| selectively permiable | letting only certain things through |
| passive transport | The movement of molecules across a membrane without energy |
| concentration | The amount of dissolved particles in a substance |
| concentration gradient | The difference in the concentration of a substance from one place to another |
| solution | |
| solute | |
| solvent | |
| diffusion | The separation of particles |
| facilitated diffusion | Diffusion across a membrane with the use of protein channels |
| dialysis | A type of endocytosis involving liquids |
| osmosis | The movement of water molecules from high to low concentration |
| osmotic pressure | Water pressure |
| isotonic solution | When a substance has the same concentration of dissolved particles as the cell |
| hypotonic solution | When a solution has a higher concentration of dissolved particles as a cell |
| hypertonic solution | When a solution has a lower concentration of dissolved particles as a cell |
| flaccid | |
| crenate | |
| lyse | |
| turgid | |
| osmorgulation | The regulation of water molecules |
| active transport | drives molecules across a membrane from low to high concentration |
| edocytosis | The process where liquids or fairly large molecules are engulfed by the membrane and taken into the cell |
| exocytosis | The process where molecules are taken out of the cell by being engulfed by membrane |
| phagocytosis | A type of endocytosis where large molecules are taken into the cell |
| pinocytosis | A type of endocytosis involving very large particles |
| receptor- mediated endocytosis | A type of endocytosis where receptors find and bring in specific particles |
Created by:
jbishop415
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