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what is diffusion? molecules moving from a high concentration to a low concentration
what is carbohydrates? consist of carbons with water attached providing long term energy storage
4 important reasons water specializes in supporting life? remains liquid over a wide temp range dissolves most substances changes temp gradually when heated or cooled one of the only pure substances that expands
3 functions of protein facilitate chemical reactions transport substances act as chemical messenger
how many amino acids does a human need? A human needs 20 amino acids 12 of the acids are from non-protein food sources the other 8 are present from your food
homeostasis availability of maintaining a constant environment
cell membrane functions transport raw materials gets rid of wastes acts as a barrier of unwanted stuff
fluid mosaic model describes that the membrane has a fluid like consistency
cholesterol in the membrane allows the cell membrane exist in a wide variety of temperatures such as cold keeping from freezing and warm keeping it from melting
osmosis the diffusion of water across a semi-permeable membrane
3 types of cellular tonicity isotonic solution hypotonic solution hyperotonic solution
isotonic solution water concentrated outside the cell is equal to the inside of the cell
hypotonic solution water concentration outside the cell is less than the th solute inside the cell
hyperotonic solution water concentration outside the cell is less than the water concentrated inside the cell
what is facilitated diffusion ? the process which substances can not move through out the cell without assistance
carrier protein changes shape to move specific molecules in or out of the cell
channel protein provides a tunnel to allow ions to move in or out of the cell
active transport helps move materials up the concentration gradient
where can you find active transport intestinal cells pump nutrients from the gut
endocytosis bringing things into the cell, membrane folds in on itself trapping matter going from high to low or low to high
exocytosis getting rid of things from the cell, it opens up and lets out matter going only low to high
bulk membrane the method of getting the materials in and out of the cell
what's a organic compound? molecule that contains carbon and hydrogen
cold temperatures keeps the membrane fluidic and flexible preventing frozen membrane
warmer temperatures maintains ridged prevents from melting
Created by: emsa2252