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Cell Membrane/Transp

QuestionAnswer
Homeostasis maintenance of constant internal conditions
Cell membrane controls homeostasis of a cell
transport life process, involves absorption and circulation
absorption end products of digestion, gases. materials entering a cell , must cross cell membrane
phospholipid bilayer double layers of fats
proteins float within phospholipid bilayer like icebergs, some on outer surface, some on inner surface
carbohydrates attached to lipids and proteins, branch from outer surface of membrane
fluid because lipids and proteins flow within membrane
mosaic made up of a variety of substances
circulation movement of materials around a cell or organism
passive transport no extra energy required to move materials through the cell membrane
active transport extra energy required to move materials through the cell membrane
3 types of passive transport diffusion, facilitated diffusion, osmosis
diffusion movement of molecules from a region of high concentration to a region of low concentration ex. students moving into a classroom
concentration gradient the difference in concentration between a region of high concentration and a region of low concentration.
What happens when concentration is on the inside concentration outside, equilibrium is reached
osmosis diffusion of water across a selectively permeable membrane from a region of high water concentration to a region of low water concentration
Created by: user-1586174
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