Cell Transport

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Passive transport does not require energy from the cell  
Concentration gradient difference in the concentration of molecules across a space  
Equilibrium concentration of molecules is equal throughout a space  
Diffusion movement of a substance down the substance’s concentration gradient, high to low concentartion  
Osmosis diffusion of water through a membrane  
Hypertonic solution causes a cell to shrink because of osmosis, movement out of a cell  
Hypotonic solution causes a cell to swell because of osmosis, movement into the cell  
Isotonic solution concentration of both solutions is equal, movement of molecules is equal  
Facilitated diffusion passive transport using carrier proteins, example sugar(glucose)  
Active transport movement of a substance against the substance’s concentration gradient, low to high concentration  
Endocytosis movement of large molecules by vesicles to the inside of the cell  
Exocytosis movement of a substance by a vesicle to the outside of the cell  
plasmolysis cells shrink due to loss of water  
carrier protein type of protein used in facilitated diffusion and active transport  
sodium-potassium pump active transport where 3 Na ions move out of a cell and 2 K ions move into the cell  

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