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SLS Cell Transport
SLS Bio12 Cell Transport HH
| Term | Definition |
|---|---|
| active transport | movement of molecules from low to high concentrations requiring ATP |
| carrier protein | move molecules such as ions and other proteins across a biological membrane; can bond and drag through the membrane and release on the other side |
| cell membrane | surrounds the cytoplasm of the cell; regulates the transport of molecules in and out the cell; very flexible |
| channel protein | embedded in the cell membrane and a have a pore for materials to cross |
| concentration gradient | molecules moving from a high concentration area to a low concentration area |
| diffusion | the intermingling of a substance by the natural movement of their particles |
| endocytosis | moving materials into the cell through pinocytosis, receptor-mediated endocytosis and phagocytosis creating a vacuole |
| exocytosis | moving materials out of the cell by fusing the vesicles to the plasma memebrane |
| facilitated transport | using transport proteins to move high to low concentration |
| fluid mosaic membrane model | model that represents the cell; fluid is the phospholipid bilayer and the mosaic is the proteins |
| glycolipid | lipid with a carbohydrate attached; communicative role, often acting as markers for cellular recognition |
| glycoprotein | protein with a carbohydrate attached; crucial part in cell-cell recognition, and have important roles in protection and the immune response, reproduction, structural integrity and cell adhesion |
| hydrophilic | water loving |
| hydrophobic | water fearing |
| hypertonic | water moves out of the cell; crenation |
| hypotonic | water moves into the cell; lysis |
| isotonic | no net movement; dynamic equilibrium |
| osmosis | diffusion of water |
| passive transport processes | no energy is required to make the molecule move |
| phagocytosis | engulfs large particles such as food, bacteria into vesicles; "cell eating" |
| phospholipid | make up the cell membrane; two fatty acids that are non polar and the head is polar containing a phosphate group and glycerol |
| phospholipid bilayer | the composition of the cell membrane; semipermeable membrane |
| pinocytosis | takes in dissolved molecules as a vesicle; "cell drinking" |
| pressure gradient | moving from higher pressure to lower pressure |
| selectively permeable | chooses what can move through and what can't |
| tonicity | tonicity is the relative concentration of solutions that determine the direction and extent of diffusion |
Created by:
hhenderson
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